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-rw-r--r--drivers/tty/hvc/Makefile1
-rw-r--r--drivers/tty/hvc/virtio_console.c1838
-rw-r--r--drivers/tty/n_gsm.c1
-rw-r--r--drivers/tty/n_hdlc.c90
-rw-r--r--drivers/tty/serial/68328serial.c29
-rw-r--r--drivers/tty/serial/68360serial.c1
-rw-r--r--drivers/tty/serial/8250.c3
-rw-r--r--drivers/tty/serial/Kconfig1
-rw-r--r--drivers/tty/serial/bfin_5xx.c15
-rw-r--r--drivers/tty/serial/max3100.c2
-rw-r--r--drivers/tty/serial/max3107.c2
-rw-r--r--drivers/tty/serial/sb1250-duart.c2
-rw-r--r--drivers/tty/sysrq.c19
-rw-r--r--drivers/tty/tty_io.c8
-rw-r--r--drivers/tty/vt/selection.c4
-rw-r--r--drivers/tty/vt/vc_screen.c16
-rw-r--r--drivers/tty/vt/vt.c135
-rw-r--r--drivers/tty/vt/vt_ioctl.c60
18 files changed, 204 insertions, 2023 deletions
diff --git a/drivers/tty/hvc/Makefile b/drivers/tty/hvc/Makefile
index e6bed5f177f..d79e7e9bf9d 100644
--- a/drivers/tty/hvc/Makefile
+++ b/drivers/tty/hvc/Makefile
@@ -10,4 +10,3 @@ obj-$(CONFIG_HVC_XEN) += hvc_xen.o
obj-$(CONFIG_HVC_IUCV) += hvc_iucv.o
obj-$(CONFIG_HVC_UDBG) += hvc_udbg.o
obj-$(CONFIG_HVCS) += hvcs.o
-obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o
diff --git a/drivers/tty/hvc/virtio_console.c b/drivers/tty/hvc/virtio_console.c
deleted file mode 100644
index 896a2ced1d2..00000000000
--- a/drivers/tty/hvc/virtio_console.c
+++ /dev/null
@@ -1,1838 +0,0 @@
-/*
- * Copyright (C) 2006, 2007, 2009 Rusty Russell, IBM Corporation
- * Copyright (C) 2009, 2010 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include <linux/cdev.h>
-#include <linux/debugfs.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/poll.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/virtio.h>
-#include <linux/virtio_console.h>
-#include <linux/wait.h>
-#include <linux/workqueue.h>
-#include "hvc_console.h"
-
-/*
- * This is a global struct for storing common data for all the devices
- * this driver handles.
- *
- * Mainly, it has a linked list for all the consoles in one place so
- * that callbacks from hvc for get_chars(), put_chars() work properly
- * across multiple devices and multiple ports per device.
- */
-struct ports_driver_data {
- /* Used for registering chardevs */
- struct class *class;
-
- /* Used for exporting per-port information to debugfs */
- struct dentry *debugfs_dir;
-
- /* List of all the devices we're handling */
- struct list_head portdevs;
-
- /* Number of devices this driver is handling */
- unsigned int index;
-
- /*
- * This is used to keep track of the number of hvc consoles
- * spawned by this driver. This number is given as the first
- * argument to hvc_alloc(). To correctly map an initial
- * console spawned via hvc_instantiate to the console being
- * hooked up via hvc_alloc, we need to pass the same vtermno.
- *
- * We also just assume the first console being initialised was
- * the first one that got used as the initial console.
- */
- unsigned int next_vtermno;
-
- /* All the console devices handled by this driver */
- struct list_head consoles;
-};
-static struct ports_driver_data pdrvdata;
-
-DEFINE_SPINLOCK(pdrvdata_lock);
-
-/* This struct holds information that's relevant only for console ports */
-struct console {
- /* We'll place all consoles in a list in the pdrvdata struct */
- struct list_head list;
-
- /* The hvc device associated with this console port */
- struct hvc_struct *hvc;
-
- /* The size of the console */
- struct winsize ws;
-
- /*
- * This number identifies the number that we used to register
- * with hvc in hvc_instantiate() and hvc_alloc(); this is the
- * number passed on by the hvc callbacks to us to
- * differentiate between the other console ports handled by
- * this driver
- */
- u32 vtermno;
-};
-
-struct port_buffer {
- char *buf;
-
- /* size of the buffer in *buf above */
- size_t size;
-
- /* used length of the buffer */
- size_t len;
- /* offset in the buf from which to consume data */
- size_t offset;
-};
-
-/*
- * This is a per-device struct that stores data common to all the
- * ports for that device (vdev->priv).
- */
-struct ports_device {
- /* Next portdev in the list, head is in the pdrvdata struct */
- struct list_head list;
-
- /*
- * Workqueue handlers where we process deferred work after
- * notification
- */
- struct work_struct control_work;
-
- struct list_head ports;
-
- /* To protect the list of ports */
- spinlock_t ports_lock;
-
- /* To protect the vq operations for the control channel */
- spinlock_t cvq_lock;
-
- /* The current config space is stored here */
- struct virtio_console_config config;
-
- /* The virtio device we're associated with */
- struct virtio_device *vdev;
-
- /*
- * A couple of virtqueues for the control channel: one for
- * guest->host transfers, one for host->guest transfers
- */
- struct virtqueue *c_ivq, *c_ovq;
-
- /* Array of per-port IO virtqueues */
- struct virtqueue **in_vqs, **out_vqs;
-
- /* Used for numbering devices for sysfs and debugfs */
- unsigned int drv_index;
-
- /* Major number for this device. Ports will be created as minors. */
- int chr_major;
-};
-
-/* This struct holds the per-port data */
-struct port {
- /* Next port in the list, head is in the ports_device */
- struct list_head list;
-
- /* Pointer to the parent virtio_console device */
- struct ports_device *portdev;
-
- /* The current buffer from which data has to be fed to readers */
- struct port_buffer *inbuf;
-
- /*
- * To protect the operations on the in_vq associated with this
- * port. Has to be a spinlock because it can be called from
- * interrupt context (get_char()).
- */
- spinlock_t inbuf_lock;
-
- /* Protect the operations on the out_vq. */
- spinlock_t outvq_lock;
-
- /* The IO vqs for this port */
- struct virtqueue *in_vq, *out_vq;
-
- /* File in the debugfs directory that exposes this port's information */
- struct dentry *debugfs_file;
-
- /*
- * The entries in this struct will be valid if this port is
- * hooked up to an hvc console
- */
- struct console cons;
-
- /* Each port associates with a separate char device */
- struct cdev *cdev;
- struct device *dev;
-
- /* Reference-counting to handle port hot-unplugs and file operations */
- struct kref kref;
-
- /* A waitqueue for poll() or blocking read operations */
- wait_queue_head_t waitqueue;
-
- /* The 'name' of the port that we expose via sysfs properties */
- char *name;
-
- /* We can notify apps of host connect / disconnect events via SIGIO */
- struct fasync_struct *async_queue;
-
- /* The 'id' to identify the port with the Host */
- u32 id;
-
- bool outvq_full;
-
- /* Is the host device open */
- bool host_connected;
-
- /* We should allow only one process to open a port */
- bool guest_connected;
-};
-
-/* This is the very early arch-specified put chars function. */
-static int (*early_put_chars)(u32, const char *, int);
-
-static struct port *find_port_by_vtermno(u32 vtermno)
-{
- struct port *port;
- struct console *cons;
- unsigned long flags;
-
- spin_lock_irqsave(&pdrvdata_lock, flags);
- list_for_each_entry(cons, &pdrvdata.consoles, list) {
- if (cons->vtermno == vtermno) {
- port = container_of(cons, struct port, cons);
- goto out;
- }
- }
- port = NULL;
-out:
- spin_unlock_irqrestore(&pdrvdata_lock, flags);
- return port;
-}
-
-static struct port *find_port_by_devt_in_portdev(struct ports_device *portdev,
- dev_t dev)
-{
- struct port *port;
- unsigned long flags;
-
- spin_lock_irqsave(&portdev->ports_lock, flags);
- list_for_each_entry(port, &portdev->ports, list)
- if (port->cdev->dev == dev)
- goto out;
- port = NULL;
-out:
- spin_unlock_irqrestore(&portdev->ports_lock, flags);
-
- return port;
-}
-
-static struct port *find_port_by_devt(dev_t dev)
-{
- struct ports_device *portdev;
- struct port *port;
- unsigned long flags;
-
- spin_lock_irqsave(&pdrvdata_lock, flags);
- list_for_each_entry(portdev, &pdrvdata.portdevs, list) {
- port = find_port_by_devt_in_portdev(portdev, dev);
- if (port)
- goto out;
- }
- port = NULL;
-out:
- spin_unlock_irqrestore(&pdrvdata_lock, flags);
- return port;
-}
-
-static struct port *find_port_by_id(struct ports_device *portdev, u32 id)
-{
- struct port *port;
- unsigned long flags;
-
- spin_lock_irqsave(&portdev->ports_lock, flags);
- list_for_each_entry(port, &portdev->ports, list)
- if (port->id == id)
- goto out;
- port = NULL;
-out:
- spin_unlock_irqrestore(&portdev->ports_lock, flags);
-
- return port;
-}
-
-static struct port *find_port_by_vq(struct ports_device *portdev,
- struct virtqueue *vq)
-{
- struct port *port;
- unsigned long flags;
-
- spin_lock_irqsave(&portdev->ports_lock, flags);
- list_for_each_entry(port, &portdev->ports, list)
- if (port->in_vq == vq || port->out_vq == vq)
- goto out;
- port = NULL;
-out:
- spin_unlock_irqrestore(&portdev->ports_lock, flags);
- return port;
-}
-
-static bool is_console_port(struct port *port)
-{
- if (port->cons.hvc)
- return true;
- return false;
-}
-
-static inline bool use_multiport(struct ports_device *portdev)
-{
- /*
- * This condition can be true when put_chars is called from
- * early_init
- */
- if (!portdev->vdev)
- return 0;
- return portdev->vdev->features[0] & (1 << VIRTIO_CONSOLE_F_MULTIPORT);
-}
-
-static void free_buf(struct port_buffer *buf)
-{
- kfree(buf->buf);
- kfree(buf);
-}
-
-static struct port_buffer *alloc_buf(size_t buf_size)
-{
- struct port_buffer *buf;
-
- buf = kmalloc(sizeof(*buf), GFP_KERNEL);
- if (!buf)
- goto fail;
- buf->buf = kzalloc(buf_size, GFP_KERNEL);
- if (!buf->buf)
- goto free_buf;
- buf->len = 0;
- buf->offset = 0;
- buf->size = buf_size;
- return buf;
-
-free_buf:
- kfree(buf);
-fail:
- return NULL;
-}
-
-/* Callers should take appropriate locks */
-static void *get_inbuf(struct port *port)
-{
- struct port_buffer *buf;
- struct virtqueue *vq;
- unsigned int len;
-
- vq = port->in_vq;
- buf = virtqueue_get_buf(vq, &len);
- if (buf) {
- buf->len = len;
- buf->offset = 0;
- }
- return buf;
-}
-
-/*
- * Create a scatter-gather list representing our input buffer and put
- * it in the queue.
- *
- * Callers should take appropriate locks.
- */
-static int add_inbuf(struct virtqueue *vq, struct port_buffer *buf)
-{
- struct scatterlist sg[1];
- int ret;
-
- sg_init_one(sg, buf->buf, buf->size);
-
- ret = virtqueue_add_buf(vq, sg, 0, 1, buf);
- virtqueue_kick(vq);
- return ret;
-}
-
-/* Discard any unread data this port has. Callers lockers. */
-static void discard_port_data(struct port *port)
-{
- struct port_buffer *buf;
- struct virtqueue *vq;
- unsigned int len;
- int ret;
-
- vq = port->in_vq;
- if (port->inbuf)
- buf = port->inbuf;
- else
- buf = virtqueue_get_buf(vq, &len);
-
- ret = 0;
- while (buf) {
- if (add_inbuf(vq, buf) < 0) {
- ret++;
- free_buf(buf);
- }
- buf = virtqueue_get_buf(vq, &len);
- }
- port->inbuf = NULL;
- if (ret)
- dev_warn(port->dev, "Errors adding %d buffers back to vq\n",
- ret);
-}
-
-static bool port_has_data(struct port *port)
-{
- unsigned long flags;
- bool ret;
-
- spin_lock_irqsave(&port->inbuf_lock, flags);
- if (port->inbuf) {
- ret = true;
- goto out;
- }
- port->inbuf = get_inbuf(port);
- if (port->inbuf) {
- ret = true;
- goto out;
- }
- ret = false;
-out:
- spin_unlock_irqrestore(&port->inbuf_lock, flags);
- return ret;
-}
-
-static ssize_t __send_control_msg(struct ports_device *portdev, u32 port_id,
- unsigned int event, unsigned int value)
-{
- struct scatterlist sg[1];
- struct virtio_console_control cpkt;
- struct virtqueue *vq;
- unsigned int len;
-
- if (!use_multiport(portdev))
- return 0;
-
- cpkt.id = port_id;
- cpkt.event = event;
- cpkt.value = value;
-
- vq = portdev->c_ovq;
-
- sg_init_one(sg, &cpkt, sizeof(cpkt));
- if (virtqueue_add_buf(vq, sg, 1, 0, &cpkt) >= 0) {
- virtqueue_kick(vq);
- while (!virtqueue_get_buf(vq, &len))
- cpu_relax();
- }
- return 0;
-}
-
-static ssize_t send_control_msg(struct port *port, unsigned int event,
- unsigned int value)
-{
- /* Did the port get unplugged before userspace closed it? */
- if (port->portdev)
- return __send_control_msg(port->portdev, port->id, event, value);
- return 0;
-}
-
-/* Callers must take the port->outvq_lock */
-static void reclaim_consumed_buffers(struct port *port)
-{
- void *buf;
- unsigned int len;
-
- while ((buf = virtqueue_get_buf(port->out_vq, &len))) {
- kfree(buf);
- port->outvq_full = false;
- }
-}
-
-static ssize_t send_buf(struct port *port, void *in_buf, size_t in_count,
- bool nonblock)
-{
- struct scatterlist sg[1];
- struct virtqueue *out_vq;
- ssize_t ret;
- unsigned long flags;
- unsigned int len;
-
- out_vq = port->out_vq;
-
- spin_lock_irqsave(&port->outvq_lock, flags);
-
- reclaim_consumed_buffers(port);
-
- sg_init_one(sg, in_buf, in_count);
- ret = virtqueue_add_buf(out_vq, sg, 1, 0, in_buf);
-
- /* Tell Host to go! */
- virtqueue_kick(out_vq);
-
- if (ret < 0) {
- in_count = 0;
- goto done;
- }
-
- if (ret == 0)
- port->outvq_full = true;
-
- if (nonblock)
- goto done;
-
- /*
- * Wait till the host acknowledges it pushed out the data we
- * sent. This is done for data from the hvc_console; the tty
- * operations are performed with spinlocks held so we can't
- * sleep here. An alternative would be to copy the data to a
- * buffer and relax the spinning requirement. The downside is
- * we need to kmalloc a GFP_ATOMIC buffer each time the
- * console driver writes something out.
- */
- while (!virtqueue_get_buf(out_vq, &len))
- cpu_relax();
-done:
- spin_unlock_irqrestore(&port->outvq_lock, flags);
- /*
- * We're expected to return the amount of data we wrote -- all
- * of it
- */
- return in_count;
-}
-
-/*
- * Give out the data that's requested from the buffer that we have
- * queued up.
- */
-static ssize_t fill_readbuf(struct port *port, char *out_buf, size_t out_count,
- bool to_user)
-{
- struct port_buffer *buf;
- unsigned long flags;
-
- if (!out_count || !port_has_data(port))
- return 0;
-
- buf = port->inbuf;
- out_count = min(out_count, buf->len - buf->offset);
-
- if (to_user) {
- ssize_t ret;
-
- ret = copy_to_user(out_buf, buf->buf + buf->offset, out_count);
- if (ret)
- return -EFAULT;
- } else {
- memcpy(out_buf, buf->buf + buf->offset, out_count);
- }
-
- buf->offset += out_count;
-
- if (buf->offset == buf->len) {
- /*
- * We're done using all the data in this buffer.
- * Re-queue so that the Host can send us more data.
- */
- spin_lock_irqsave(&port->inbuf_lock, flags);
- port->inbuf = NULL;
-
- if (add_inbuf(port->in_vq, buf) < 0)
- dev_warn(port->dev, "failed add_buf\n");
-
- spin_unlock_irqrestore(&port->inbuf_lock, flags);
- }
- /* Return the number of bytes actually copied */
- return out_count;
-}
-
-/* The condition that must be true for polling to end */
-static bool will_read_block(struct port *port)
-{
- if (!port->guest_connected) {
- /* Port got hot-unplugged. Let's exit. */
- return false;
- }
- return !port_has_data(port) && port->host_connected;
-}
-
-static bool will_write_block(struct port *port)
-{
- bool ret;
-
- if (!port->guest_connected) {
- /* Port got hot-unplugged. Let's exit. */
- return false;
- }
- if (!port->host_connected)
- return true;
-
- spin_lock_irq(&port->outvq_lock);
- /*
- * Check if the Host has consumed any buffers since we last
- * sent data (this is only applicable for nonblocking ports).
- */
- reclaim_consumed_buffers(port);
- ret = port->outvq_full;
- spin_unlock_irq(&port->outvq_lock);
-
- return ret;
-}
-
-static ssize_t port_fops_read(struct file *filp, char __user *ubuf,
- size_t count, loff_t *offp)
-{
- struct port *port;
- ssize_t ret;
-
- port = filp->private_data;
-
- if (!port_has_data(port)) {
- /*
- * If nothing's connected on the host just return 0 in
- * case of list_empty; this tells the userspace app
- * that there's no connection
- */
- if (!port->host_connected)
- return 0;
- if (filp->f_flags & O_NONBLOCK)
- return -EAGAIN;
-
- ret = wait_event_interruptible(port->waitqueue,
- !will_read_block(port));
- if (ret < 0)
- return ret;
- }
- /* Port got hot-unplugged. */
- if (!port->guest_connected)
- return -ENODEV;
- /*
- * We could've received a disconnection message while we were
- * waiting for more data.
- *
- * This check is not clubbed in the if() statement above as we
- * might receive some data as well as the host could get
- * disconnected after we got woken up from our wait. So we
- * really want to give off whatever data we have and only then
- * check for host_connected.
- */
- if (!port_has_data(port) && !port->host_connected)
- return 0;
-
- return fill_readbuf(port, ubuf, count, true);
-}
-
-static ssize_t port_fops_write(struct file *filp, const char __user *ubuf,
- size_t count, loff_t *offp)
-{
- struct port *port;
- char *buf;
- ssize_t ret;
- bool nonblock;
-
- /* Userspace could be out to fool us */
- if (!count)
- return 0;
-
- port = filp->private_data;
-
- nonblock = filp->f_flags & O_NONBLOCK;
-
- if (will_write_block(port)) {
- if (nonblock)
- return -EAGAIN;
-
- ret = wait_event_interruptible(port->waitqueue,
- !will_write_block(port));
- if (ret < 0)
- return ret;
- }
- /* Port got hot-unplugged. */
- if (!port->guest_connected)
- return -ENODEV;
-
- count = min((size_t)(32 * 1024), count);
-
- buf = kmalloc(count, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- ret = copy_from_user(buf, ubuf, count);
- if (ret) {
- ret = -EFAULT;
- goto free_buf;
- }
-
- /*
- * We now ask send_buf() to not spin for generic ports -- we
- * can re-use the same code path that non-blocking file
- * descriptors take for blocking file descriptors since the
- * wait is already done and we're certain the write will go
- * through to the host.
- */
- nonblock = true;
- ret = send_buf(port, buf, count, nonblock);
-
- if (nonblock && ret > 0)
- goto out;
-
-free_buf:
- kfree(buf);
-out:
- return ret;
-}
-
-static unsigned int port_fops_poll(struct file *filp, poll_table *wait)
-{
- struct port *port;
- unsigned int ret;
-
- port = filp->private_data;
- poll_wait(filp, &port->waitqueue, wait);
-
- if (!port->guest_connected) {
- /* Port got unplugged */
- return POLLHUP;
- }
- ret = 0;
- if (!will_read_block(port))
- ret |= POLLIN | POLLRDNORM;
- if (!will_write_block(port))
- ret |= POLLOUT;
- if (!port->host_connected)
- ret |= POLLHUP;
-
- return ret;
-}
-
-static void remove_port(struct kref *kref);
-
-static int port_fops_release(struct inode *inode, struct file *filp)
-{
- struct port *port;
-
- port = filp->private_data;
-
- /* Notify host of port being closed */
- send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 0);
-
- spin_lock_irq(&port->inbuf_lock);
- port->guest_connected = false;
-
- discard_port_data(port);
-
- spin_unlock_irq(&port->inbuf_lock);
-
- spin_lock_irq(&port->outvq_lock);
- reclaim_consumed_buffers(port);
- spin_unlock_irq(&port->outvq_lock);
-
- /*
- * Locks aren't necessary here as a port can't be opened after
- * unplug, and if a port isn't unplugged, a kref would already
- * exist for the port. Plus, taking ports_lock here would
- * create a dependency on other locks taken by functions
- * inside remove_port if we're the last holder of the port,
- * creating many problems.
- */
- kref_put(&port->kref, remove_port);
-
- return 0;
-}
-
-static int port_fops_open(struct inode *inode, struct file *filp)
-{
- struct cdev *cdev = inode->i_cdev;
- struct port *port;
- int ret;
-
- port = find_port_by_devt(cdev->dev);
- filp->private_data = port;
-
- /* Prevent against a port getting hot-unplugged at the same time */
- spin_lock_irq(&port->portdev->ports_lock);
- kref_get(&port->kref);
- spin_unlock_irq(&port->portdev->ports_lock);
-
- /*
- * Don't allow opening of console port devices -- that's done
- * via /dev/hvc
- */
- if (is_console_port(port)) {
- ret = -ENXIO;
- goto out;
- }
-
- /* Allow only one process to open a particular port at a time */
- spin_lock_irq(&port->inbuf_lock);
- if (port->guest_connected) {
- spin_unlock_irq(&port->inbuf_lock);
- ret = -EMFILE;
- goto out;
- }
-
- port->guest_connected = true;
- spin_unlock_irq(&port->inbuf_lock);
-
- spin_lock_irq(&port->outvq_lock);
- /*
- * There might be a chance that we missed reclaiming a few
- * buffers in the window of the port getting previously closed
- * and opening now.
- */
- reclaim_consumed_buffers(port);
- spin_unlock_irq(&port->outvq_lock);
-
- nonseekable_open(inode, filp);
-
- /* Notify host of port being opened */
- send_control_msg(filp->private_data, VIRTIO_CONSOLE_PORT_OPEN, 1);
-
- return 0;
-out:
- kref_put(&port->kref, remove_port);
- return ret;
-}
-
-static int port_fops_fasync(int fd, struct file *filp, int mode)
-{
- struct port *port;
-
- port = filp->private_data;
- return fasync_helper(fd, filp, mode, &port->async_queue);
-}
-
-/*
- * The file operations that we support: programs in the guest can open
- * a console device, read from it, write to it, poll for data and
- * close it. The devices are at
- * /dev/vport<device number>p<port number>
- */
-static const struct file_operations port_fops = {
- .owner = THIS_MODULE,
- .open = port_fops_open,
- .read = port_fops_read,
- .write = port_fops_write,
- .poll = port_fops_poll,
- .release = port_fops_release,
- .fasync = port_fops_fasync,
- .llseek = no_llseek,
-};
-
-/*
- * The put_chars() callback is pretty straightforward.
- *
- * We turn the characters into a scatter-gather list, add it to the
- * output queue and then kick the Host. Then we sit here waiting for
- * it to finish: inefficient in theory, but in practice
- * implementations will do it immediately (lguest's Launcher does).
- */
-static int put_chars(u32 vtermno, const char *buf, int count)
-{
- struct port *port;
-
- if (unlikely(early_put_chars))
- return early_put_chars(vtermno, buf, count);
-
- port = find_port_by_vtermno(vtermno);
- if (!port)
- return -EPIPE;
-
- return send_buf(port, (void *)buf, count, false);
-}
-
-/*
- * get_chars() is the callback from the hvc_console infrastructure
- * when an interrupt is received.
- *
- * We call out to fill_readbuf that gets us the required data from the
- * buffers that are queued up.
- */
-static int get_chars(u32 vtermno, char *buf, int count)
-{
- struct port *port;
-
- /* If we've not set up the port yet, we have no input to give. */
- if (unlikely(early_put_chars))
- return 0;
-
- port = find_port_by_vtermno(vtermno);
- if (!port)
- return -EPIPE;
-
- /* If we don't have an input queue yet, we can't get input. */
- BUG_ON(!port->in_vq);
-
- return fill_readbuf(port, buf, count, false);
-}
-
-static void resize_console(struct port *port)
-{
- struct virtio_device *vdev;
-
- /* The port could have been hot-unplugged */
- if (!port || !is_console_port(port))
- return;
-
- vdev = port->portdev->vdev;
- if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE))
- hvc_resize(port->cons.hvc, port->cons.ws);
-}
-
-/* We set the configuration at this point, since we now have a tty */
-static int notifier_add_vio(struct hvc_struct *hp, int data)
-{
- struct port *port;
-
- port = find_port_by_vtermno(hp->vtermno);
- if (!port)
- return -EINVAL;
-
- hp->irq_requested = 1;
- resize_console(port);
-
- return 0;
-}
-
-static void notifier_del_vio(struct hvc_struct *hp, int data)
-{
- hp->irq_requested = 0;
-}
-
-/* The operations for console ports. */
-static const struct hv_ops hv_ops = {
- .get_chars = get_chars,
- .put_chars = put_chars,
- .notifier_add = notifier_add_vio,
- .notifier_del = notifier_del_vio,
- .notifier_hangup = notifier_del_vio,
-};
-
-/*
- * Console drivers are initialized very early so boot messages can go
- * out, so we do things slightly differently from the generic virtio
- * initialization of the net and block drivers.
- *
- * At this stage, the console is output-only. It's too early to set
- * up a virtqueue, so we let the drivers do some boutique early-output
- * thing.
- */
-int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int))
-{
- early_put_chars = put_chars;
- return hvc_instantiate(0, 0, &hv_ops);
-}
-
-int init_port_console(struct port *port)
-{
- int ret;
-
- /*
- * The Host's telling us this port is a console port. Hook it
- * up with an hvc console.
- *
- * To set up and manage our virtual console, we call
- * hvc_alloc().
- *
- * The first argument of hvc_alloc() is the virtual console
- * number. The second argument is the parameter for the
- * notification mechanism (like irq number). We currently
- * leave this as zero, virtqueues have implicit notifications.
- *
- * The third argument is a "struct hv_ops" containing the
- * put_chars() get_chars(), notifier_add() and notifier_del()
- * pointers. The final argument is the output buffer size: we
- * can do any size, so we put PAGE_SIZE here.
- */
- port->cons.vtermno = pdrvdata.next_vtermno;
-
- port->cons.hvc = hvc_alloc(port->cons.vtermno, 0, &hv_ops, PAGE_SIZE);
- if (IS_ERR(port->cons.hvc)) {
- ret = PTR_ERR(port->cons.hvc);
- dev_err(port->dev,
- "error %d allocating hvc for port\n", ret);
- port->cons.hvc = NULL;
- return ret;
- }
- spin_lock_irq(&pdrvdata_lock);
- pdrvdata.next_vtermno++;
- list_add_tail(&port->cons.list, &pdrvdata.consoles);
- spin_unlock_irq(&pdrvdata_lock);
- port->guest_connected = true;
-
- /*
- * Start using the new console output if this is the first
- * console to come up.
- */
- if (early_put_chars)
- early_put_chars = NULL;
-
- /* Notify host of port being opened */
- send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1);
-
- return 0;
-}
-
-static ssize_t show_port_name(struct device *dev,
- struct device_attribute *attr, char *buffer)
-{
- struct port *port;
-
- port = dev_get_drvdata(dev);
-
- return sprintf(buffer, "%s\n", port->name);
-}
-
-static DEVICE_ATTR(name, S_IRUGO, show_port_name, NULL);
-
-static struct attribute *port_sysfs_entries[] = {
- &dev_attr_name.attr,
- NULL
-};
-
-static struct attribute_group port_attribute_group = {
- .name = NULL, /* put in device directory */
- .attrs = port_sysfs_entries,
-};
-
-static int debugfs_open(struct inode *inode, struct file *filp)
-{
- filp->private_data = inode->i_private;
- return 0;
-}
-
-static ssize_t debugfs_read(struct file *filp, char __user *ubuf,
- size_t count, loff_t *offp)
-{
- struct port *port;
- char *buf;
- ssize_t ret, out_offset, out_count;
-
- out_count = 1024;
- buf = kmalloc(out_count, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- port = filp->private_data;
- out_offset = 0;
- out_offset += snprintf(buf + out_offset, out_count,
- "name: %s\n", port->name ? port->name : "");
- out_offset += snprintf(buf + out_offset, out_count - out_offset,
- "guest_connected: %d\n", port->guest_connected);
- out_offset += snprintf(buf + out_offset, out_count - out_offset,
- "host_connected: %d\n", port->host_connected);
- out_offset += snprintf(buf + out_offset, out_count - out_offset,
- "outvq_full: %d\n", port->outvq_full);
- out_offset += snprintf(buf + out_offset, out_count - out_offset,
- "is_console: %s\n",
- is_console_port(port) ? "yes" : "no");
- out_offset += snprintf(buf + out_offset, out_count - out_offset,
- "console_vtermno: %u\n", port->cons.vtermno);
-
- ret = simple_read_from_buffer(ubuf, count, offp, buf, out_offset);
- kfree(buf);
- return ret;
-}
-
-static const struct file_operations port_debugfs_ops = {
- .owner = THIS_MODULE,
- .open = debugfs_open,
- .read = debugfs_read,
-};
-
-static void set_console_size(struct port *port, u16 rows, u16 cols)
-{
- if (!port || !is_console_port(port))
- return;
-
- port->cons.ws.ws_row = rows;
- port->cons.ws.ws_col = cols;
-}
-
-static unsigned int fill_queue(struct virtqueue *vq, spinlock_t *lock)
-{
- struct port_buffer *buf;
- unsigned int nr_added_bufs;
- int ret;
-
- nr_added_bufs = 0;
- do {
- buf = alloc_buf(PAGE_SIZE);
- if (!buf)
- break;
-
- spin_lock_irq(lock);
- ret = add_inbuf(vq, buf);
- if (ret < 0) {
- spin_unlock_irq(lock);
- free_buf(buf);
- break;
- }
- nr_added_bufs++;
- spin_unlock_irq(lock);
- } while (ret > 0);
-
- return nr_added_bufs;
-}
-
-static void send_sigio_to_port(struct port *port)
-{
- if (port->async_queue && port->guest_connected)
- kill_fasync(&port->async_queue, SIGIO, POLL_OUT);
-}
-
-static int add_port(struct ports_device *portdev, u32 id)
-{
- char debugfs_name[16];
- struct port *port;
- struct port_buffer *buf;
- dev_t devt;
- unsigned int nr_added_bufs;
- int err;
-
- port = kmalloc(sizeof(*port), GFP_KERNEL);
- if (!port) {
- err = -ENOMEM;
- goto fail;
- }
- kref_init(&port->kref);
-
- port->portdev = portdev;
- port->id = id;
-
- port->name = NULL;
- port->inbuf = NULL;
- port->cons.hvc = NULL;
- port->async_queue = NULL;
-
- port->cons.ws.ws_row = port->cons.ws.ws_col = 0;
-
- port->host_connected = port->guest_connected = false;
-
- port->outvq_full = false;
-
- port->in_vq = portdev->in_vqs[port->id];
- port->out_vq = portdev->out_vqs[port->id];
-
- port->cdev = cdev_alloc();
- if (!port->cdev) {
- dev_err(&port->portdev->vdev->dev, "Error allocating cdev\n");
- err = -ENOMEM;
- goto free_port;
- }
- port->cdev->ops = &port_fops;
-
- devt = MKDEV(portdev->chr_major, id);
- err = cdev_add(port->cdev, devt, 1);
- if (err < 0) {
- dev_err(&port->portdev->vdev->dev,
- "Error %d adding cdev for port %u\n", err, id);
- goto free_cdev;
- }
- port->dev = device_create(pdrvdata.class, &port->portdev->vdev->dev,
- devt, port, "vport%up%u",
- port->portdev->drv_index, id);
- if (IS_ERR(port->dev)) {
- err = PTR_ERR(port->dev);
- dev_err(&port->portdev->vdev->dev,
- "Error %d creating device for port %u\n",
- err, id);
- goto free_cdev;
- }
-
- spin_lock_init(&port->inbuf_lock);
- spin_lock_init(&port->outvq_lock);
- init_waitqueue_head(&port->waitqueue);
-
- /* Fill the in_vq with buffers so the host can send us data. */
- nr_added_bufs = fill_queue(port->in_vq, &port->inbuf_lock);
- if (!nr_added_bufs) {
- dev_err(port->dev, "Error allocating inbufs\n");
- err = -ENOMEM;
- goto free_device;
- }
-
- /*
- * If we're not using multiport support, this has to be a console port
- */
- if (!use_multiport(port->portdev)) {
- err = init_port_console(port);
- if (err)
- goto free_inbufs;
- }
-
- spin_lock_irq(&portdev->ports_lock);
- list_add_tail(&port->list, &port->portdev->ports);
- spin_unlock_irq(&portdev->ports_lock);
-
- /*
- * Tell the Host we're set so that it can send us various
- * configuration parameters for this port (eg, port name,
- * caching, whether this is a console port, etc.)
- */
- send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
-
- if (pdrvdata.debugfs_dir) {
- /*
- * Finally, create the debugfs file that we can use to
- * inspect a port's state at any time
- */
- sprintf(debugfs_name, "vport%up%u",
- port->portdev->drv_index, id);
- port->debugfs_file = debugfs_create_file(debugfs_name, 0444,
- pdrvdata.debugfs_dir,
- port,
- &port_debugfs_ops);
- }
- return 0;
-
-free_inbufs:
- while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
- free_buf(buf);
-free_device:
- device_destroy(pdrvdata.class, port->dev->devt);
-free_cdev:
- cdev_del(port->cdev);
-free_port:
- kfree(port);
-fail:
- /* The host might want to notify management sw about port add failure */
- __send_control_msg(portdev, id, VIRTIO_CONSOLE_PORT_READY, 0);
- return err;
-}
-
-/* No users remain, remove all port-specific data. */
-static void remove_port(struct kref *kref)
-{
- struct port *port;
-
- port = container_of(kref, struct port, kref);
-
- sysfs_remove_group(&port->dev->kobj, &port_attribute_group);
- device_destroy(pdrvdata.class, port->dev->devt);
- cdev_del(port->cdev);
-
- kfree(port->name);
-
- debugfs_remove(port->debugfs_file);
-
- kfree(port);
-}
-
-/*
- * Port got unplugged. Remove port from portdev's list and drop the
- * kref reference. If no userspace has this port opened, it will
- * result in immediate removal the port.
- */
-static void unplug_port(struct port *port)
-{
- struct port_buffer *buf;
-
- spin_lock_irq(&port->portdev->ports_lock);
- list_del(&port->list);
- spin_unlock_irq(&port->portdev->ports_lock);
-
- if (port->guest_connected) {
- port->guest_connected = false;
- port->host_connected = false;
- wake_up_interruptible(&port->waitqueue);
-
- /* Let the app know the port is going down. */
- send_sigio_to_port(port);
- }
-
- if (is_console_port(port)) {
- spin_lock_irq(&pdrvdata_lock);
- list_del(&port->cons.list);
- spin_unlock_irq(&pdrvdata_lock);
-#if 0
- /*
- * hvc_remove() not called as removing one hvc port
- * results in other hvc ports getting frozen.
- *
- * Once this is resolved in hvc, this functionality
- * will be enabled. Till that is done, the -EPIPE
- * return from get_chars() above will help
- * hvc_console.c to clean up on ports we remove here.
- */
- hvc_remove(port->cons.hvc);
-#endif
- }
-
- /* Remove unused data this port might have received. */
- discard_port_data(port);
-
- reclaim_consumed_buffers(port);
-
- /* Remove buffers we queued up for the Host to send us data in. */
- while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
- free_buf(buf);
-
- /*
- * We should just assume the device itself has gone off --
- * else a close on an open port later will try to send out a
- * control message.
- */
- port->portdev = NULL;
-
- /*
- * Locks around here are not necessary - a port can't be
- * opened after we removed the port struct from ports_list
- * above.
- */
- kref_put(&port->kref, remove_port);
-}
-
-/* Any private messages that the Host and Guest want to share */
-static void handle_control_message(struct ports_device *portdev,
- struct port_buffer *buf)
-{
- struct virtio_console_control *cpkt;
- struct port *port;
- size_t name_size;
- int err;
-
- cpkt = (struct virtio_console_control *)(buf->buf + buf->offset);
-
- port = find_port_by_id(portdev, cpkt->id);
- if (!port && cpkt->event != VIRTIO_CONSOLE_PORT_ADD) {
- /* No valid header at start of buffer. Drop it. */
- dev_dbg(&portdev->vdev->dev,
- "Invalid index %u in control packet\n", cpkt->id);
- return;
- }
-
- switch (cpkt->event) {
- case VIRTIO_CONSOLE_PORT_ADD:
- if (port) {
- dev_dbg(&portdev->vdev->dev,
- "Port %u already added\n", port->id);
- send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
- break;
- }
- if (cpkt->id >= portdev->config.max_nr_ports) {
- dev_warn(&portdev->vdev->dev,
- "Request for adding port with out-of-bound id %u, max. supported id: %u\n",
- cpkt->id, portdev->config.max_nr_ports - 1);
- break;
- }
- add_port(portdev, cpkt->id);
- break;
- case VIRTIO_CONSOLE_PORT_REMOVE:
- unplug_port(port);
- break;
- case VIRTIO_CONSOLE_CONSOLE_PORT:
- if (!cpkt->value)
- break;
- if (is_console_port(port))
- break;
-
- init_port_console(port);
- /*
- * Could remove the port here in case init fails - but
- * have to notify the host first.
- */
- break;
- case VIRTIO_CONSOLE_RESIZE: {
- struct {
- __u16 rows;
- __u16 cols;
- } size;
-
- if (!is_console_port(port))
- break;
-
- memcpy(&size, buf->buf + buf->offset + sizeof(*cpkt),
- sizeof(size));
- set_console_size(port, size.rows, size.cols);
-
- port->cons.hvc->irq_requested = 1;
- resize_console(port);
- break;
- }
- case VIRTIO_CONSOLE_PORT_OPEN:
- port->host_connected = cpkt->value;
- wake_up_interruptible(&port->waitqueue);
- /*
- * If the host port got closed and the host had any
- * unconsumed buffers, we'll be able to reclaim them
- * now.
- */
- spin_lock_irq(&port->outvq_lock);
- reclaim_consumed_buffers(port);
- spin_unlock_irq(&port->outvq_lock);
-
- /*
- * If the guest is connected, it'll be interested in
- * knowing the host connection state changed.
- */
- send_sigio_to_port(port);
- break;
- case VIRTIO_CONSOLE_PORT_NAME:
- /*
- * Skip the size of the header and the cpkt to get the size
- * of the name that was sent
- */
- name_size = buf->len - buf->offset - sizeof(*cpkt) + 1;
-
- port->name = kmalloc(name_size, GFP_KERNEL);
- if (!port->name) {
- dev_err(port->dev,
- "Not enough space to store port name\n");
- break;
- }
- strncpy(port->name, buf->buf + buf->offset + sizeof(*cpkt),
- name_size - 1);
- port->name[name_size - 1] = 0;
-
- /*
- * Since we only have one sysfs attribute, 'name',
- * create it only if we have a name for the port.
- */
- err = sysfs_create_group(&port->dev->kobj,
- &port_attribute_group);
- if (err) {
- dev_err(port->dev,
- "Error %d creating sysfs device attributes\n",
- err);
- } else {
- /*
- * Generate a udev event so that appropriate
- * symlinks can be created based on udev
- * rules.
- */
- kobject_uevent(&port->dev->kobj, KOBJ_CHANGE);
- }
- break;
- }
-}
-
-static void control_work_handler(struct work_struct *work)
-{
- struct ports_device *portdev;
- struct virtqueue *vq;
- struct port_buffer *buf;
- unsigned int len;
-
- portdev = container_of(work, struct ports_device, control_work);
- vq = portdev->c_ivq;
-
- spin_lock(&portdev->cvq_lock);
- while ((buf = virtqueue_get_buf(vq, &len))) {
- spin_unlock(&portdev->cvq_lock);
-
- buf->len = len;
- buf->offset = 0;
-
- handle_control_message(portdev, buf);
-
- spin_lock(&portdev->cvq_lock);
- if (add_inbuf(portdev->c_ivq, buf) < 0) {
- dev_warn(&portdev->vdev->dev,
- "Error adding buffer to queue\n");
- free_buf(buf);
- }
- }
- spin_unlock(&portdev->cvq_lock);
-}
-
-static void in_intr(struct virtqueue *vq)
-{
- struct port *port;
- unsigned long flags;
-
- port = find_port_by_vq(vq->vdev->priv, vq);
- if (!port)
- return;
-
- spin_lock_irqsave(&port->inbuf_lock, flags);
- if (!port->inbuf)
- port->inbuf = get_inbuf(port);
-
- /*
- * Don't queue up data when port is closed. This condition
- * can be reached when a console port is not yet connected (no
- * tty is spawned) and the host sends out data to console
- * ports. For generic serial ports, the host won't
- * (shouldn't) send data till the guest is connected.
- */
- if (!port->guest_connected)
- discard_port_data(port);
-
- spin_unlock_irqrestore(&port->inbuf_lock, flags);
-
- wake_up_interruptible(&port->waitqueue);
-
- /* Send a SIGIO indicating new data in case the process asked for it */
- send_sigio_to_port(port);
-
- if (is_console_port(port) && hvc_poll(port->cons.hvc))
- hvc_kick();
-}
-
-static void control_intr(struct virtqueue *vq)
-{
- struct ports_device *portdev;
-
- portdev = vq->vdev->priv;
- schedule_work(&portdev->control_work);
-}
-
-static void config_intr(struct virtio_device *vdev)
-{
- struct ports_device *portdev;
-
- portdev = vdev->priv;
-
- if (!use_multiport(portdev)) {
- struct port *port;
- u16 rows, cols;
-
- vdev->config->get(vdev,
- offsetof(struct virtio_console_config, cols),
- &cols, sizeof(u16));
- vdev->config->get(vdev,
- offsetof(struct virtio_console_config, rows),
- &rows, sizeof(u16));
-
- port = find_port_by_id(portdev, 0);
- set_console_size(port, rows, cols);
-
- /*
- * We'll use this way of resizing only for legacy
- * support. For newer userspace
- * (VIRTIO_CONSOLE_F_MULTPORT+), use control messages
- * to indicate console size changes so that it can be
- * done per-port.
- */
- resize_console(port);
- }
-}
-
-static int init_vqs(struct ports_device *portdev)
-{
- vq_callback_t **io_callbacks;
- char **io_names;
- struct virtqueue **vqs;
- u32 i, j, nr_ports, nr_queues;
- int err;
-
- nr_ports = portdev->config.max_nr_ports;
- nr_queues = use_multiport(portdev) ? (nr_ports + 1) * 2 : 2;
-
- vqs = kmalloc(nr_queues * sizeof(struct virtqueue *), GFP_KERNEL);
- io_callbacks = kmalloc(nr_queues * sizeof(vq_callback_t *), GFP_KERNEL);
- io_names = kmalloc(nr_queues * sizeof(char *), GFP_KERNEL);
- portdev->in_vqs = kmalloc(nr_ports * sizeof(struct virtqueue *),
- GFP_KERNEL);
- portdev->out_vqs = kmalloc(nr_ports * sizeof(struct virtqueue *),
- GFP_KERNEL);
- if (!vqs || !io_callbacks || !io_names || !portdev->in_vqs ||
- !portdev->out_vqs) {
- err = -ENOMEM;
- goto free;
- }
-
- /*
- * For backward compat (newer host but older guest), the host
- * spawns a console port first and also inits the vqs for port
- * 0 before others.
- */
- j = 0;
- io_callbacks[j] = in_intr;
- io_callbacks[j + 1] = NULL;
- io_names[j] = "input";
- io_names[j + 1] = "output";
- j += 2;
-
- if (use_multiport(portdev)) {
- io_callbacks[j] = control_intr;
- io_callbacks[j + 1] = NULL;
- io_names[j] = "control-i";
- io_names[j + 1] = "control-o";
-
- for (i = 1; i < nr_ports; i++) {
- j += 2;
- io_callbacks[j] = in_intr;
- io_callbacks[j + 1] = NULL;
- io_names[j] = "input";
- io_names[j + 1] = "output";
- }
- }
- /* Find the queues. */
- err = portdev->vdev->config->find_vqs(portdev->vdev, nr_queues, vqs,
- io_callbacks,
- (const char **)io_names);
- if (err)
- goto free;
-
- j = 0;
- portdev->in_vqs[0] = vqs[0];
- portdev->out_vqs[0] = vqs[1];
- j += 2;
- if (use_multiport(portdev)) {
- portdev->c_ivq = vqs[j];
- portdev->c_ovq = vqs[j + 1];
-
- for (i = 1; i < nr_ports; i++) {
- j += 2;
- portdev->in_vqs[i] = vqs[j];
- portdev->out_vqs[i] = vqs[j + 1];
- }
- }
- kfree(io_names);
- kfree(io_callbacks);
- kfree(vqs);
-
- return 0;
-
-free:
- kfree(portdev->out_vqs);
- kfree(portdev->in_vqs);
- kfree(io_names);
- kfree(io_callbacks);
- kfree(vqs);
-
- return err;
-}
-
-static const struct file_operations portdev_fops = {
- .owner = THIS_MODULE,
-};
-
-/*
- * Once we're further in boot, we get probed like any other virtio
- * device.
- *
- * If the host also supports multiple console ports, we check the
- * config space to see how many ports the host has spawned. We
- * initialize each port found.
- */
-static int __devinit virtcons_probe(struct virtio_device *vdev)
-{
- struct ports_device *portdev;
- int err;
- bool multiport;
-
- portdev = kmalloc(sizeof(*portdev), GFP_KERNEL);
- if (!portdev) {
- err = -ENOMEM;
- goto fail;
- }
-
- /* Attach this portdev to this virtio_device, and vice-versa. */
- portdev->vdev = vdev;
- vdev->priv = portdev;
-
- spin_lock_irq(&pdrvdata_lock);
- portdev->drv_index = pdrvdata.index++;
- spin_unlock_irq(&pdrvdata_lock);
-
- portdev->chr_major = register_chrdev(0, "virtio-portsdev",
- &portdev_fops);
- if (portdev->chr_major < 0) {
- dev_err(&vdev->dev,
- "Error %d registering chrdev for device %u\n",
- portdev->chr_major, portdev->drv_index);
- err = portdev->chr_major;
- goto free;
- }
-
- multiport = false;
- portdev->config.max_nr_ports = 1;
- if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT)) {
- multiport = true;
- vdev->features[0] |= 1 << VIRTIO_CONSOLE_F_MULTIPORT;
-
- vdev->config->get(vdev, offsetof(struct virtio_console_config,
- max_nr_ports),
- &portdev->config.max_nr_ports,
- sizeof(portdev->config.max_nr_ports));
- }
-
- /* Let the Host know we support multiple ports.*/
- vdev->config->finalize_features(vdev);
-
- err = init_vqs(portdev);
- if (err < 0) {
- dev_err(&vdev->dev, "Error %d initializing vqs\n", err);
- goto free_chrdev;
- }
-
- spin_lock_init(&portdev->ports_lock);
- INIT_LIST_HEAD(&portdev->ports);
-
- if (multiport) {
- unsigned int nr_added_bufs;
-
- spin_lock_init(&portdev->cvq_lock);
- INIT_WORK(&portdev->control_work, &control_work_handler);
-
- nr_added_bufs = fill_queue(portdev->c_ivq, &portdev->cvq_lock);
- if (!nr_added_bufs) {
- dev_err(&vdev->dev,
- "Error allocating buffers for control queue\n");
- err = -ENOMEM;
- goto free_vqs;
- }
- } else {
- /*
- * For backward compatibility: Create a console port
- * if we're running on older host.
- */
- add_port(portdev, 0);
- }
-
- spin_lock_irq(&pdrvdata_lock);
- list_add_tail(&portdev->list, &pdrvdata.portdevs);
- spin_unlock_irq(&pdrvdata_lock);
-
- __send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID,
- VIRTIO_CONSOLE_DEVICE_READY, 1);
- return 0;
-
-free_vqs:
- /* The host might want to notify mgmt sw about device add failure */
- __send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID,
- VIRTIO_CONSOLE_DEVICE_READY, 0);
- vdev->config->del_vqs(vdev);
- kfree(portdev->in_vqs);
- kfree(portdev->out_vqs);
-free_chrdev:
- unregister_chrdev(portdev->chr_major, "virtio-portsdev");
-free:
- kfree(portdev);
-fail:
- return err;
-}
-
-static void virtcons_remove(struct virtio_device *vdev)
-{
- struct ports_device *portdev;
- struct port *port, *port2;
-
- portdev = vdev->priv;
-
- spin_lock_irq(&pdrvdata_lock);
- list_del(&portdev->list);
- spin_unlock_irq(&pdrvdata_lock);
-
- /* Disable interrupts for vqs */
- vdev->config->reset(vdev);
- /* Finish up work that's lined up */
- cancel_work_sync(&portdev->control_work);
-
- list_for_each_entry_safe(port, port2, &portdev->ports, list)
- unplug_port(port);
-
- unregister_chrdev(portdev->chr_major, "virtio-portsdev");
-
- /*
- * When yanking out a device, we immediately lose the
- * (device-side) queues. So there's no point in keeping the
- * guest side around till we drop our final reference. This
- * also means that any ports which are in an open state will
- * have to just stop using the port, as the vqs are going
- * away.
- */
- if (use_multiport(portdev)) {
- struct port_buffer *buf;
- unsigned int len;
-
- while ((buf = virtqueue_get_buf(portdev->c_ivq, &len)))
- free_buf(buf);
-
- while ((buf = virtqueue_detach_unused_buf(portdev->c_ivq)))
- free_buf(buf);
- }
-
- vdev->config->del_vqs(vdev);
- kfree(portdev->in_vqs);
- kfree(portdev->out_vqs);
-
- kfree(portdev);
-}
-
-static struct virtio_device_id id_table[] = {
- { VIRTIO_ID_CONSOLE, VIRTIO_DEV_ANY_ID },
- { 0 },
-};
-
-static unsigned int features[] = {
- VIRTIO_CONSOLE_F_SIZE,
- VIRTIO_CONSOLE_F_MULTIPORT,
-};
-
-static struct virtio_driver virtio_console = {
- .feature_table = features,
- .feature_table_size = ARRAY_SIZE(features),
- .driver.name = KBUILD_MODNAME,
- .driver.owner = THIS_MODULE,
- .id_table = id_table,
- .probe = virtcons_probe,
- .remove = virtcons_remove,
- .config_changed = config_intr,
-};
-
-static int __init init(void)
-{
- int err;
-
- pdrvdata.class = class_create(THIS_MODULE, "virtio-ports");
- if (IS_ERR(pdrvdata.class)) {
- err = PTR_ERR(pdrvdata.class);
- pr_err("Error %d creating virtio-ports class\n", err);
- return err;
- }
-
- pdrvdata.debugfs_dir = debugfs_create_dir("virtio-ports", NULL);
- if (!pdrvdata.debugfs_dir) {
- pr_warning("Error %ld creating debugfs dir for virtio-ports\n",
- PTR_ERR(pdrvdata.debugfs_dir));
- }
- INIT_LIST_HEAD(&pdrvdata.consoles);
- INIT_LIST_HEAD(&pdrvdata.portdevs);
-
- return register_virtio_driver(&virtio_console);
-}
-
-static void __exit fini(void)
-{
- unregister_virtio_driver(&virtio_console);
-
- class_destroy(pdrvdata.class);
- if (pdrvdata.debugfs_dir)
- debugfs_remove_recursive(pdrvdata.debugfs_dir);
-}
-module_init(init);
-module_exit(fini);
-
-MODULE_DEVICE_TABLE(virtio, id_table);
-MODULE_DESCRIPTION("Virtio console driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 44b8412a04e..aa2e5d3eb01 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2414,6 +2414,7 @@ static int gsmld_config(struct tty_struct *tty, struct gsm_mux *gsm,
gsm->initiator = c->initiator;
gsm->mru = c->mru;
+ gsm->mtu = c->mtu;
gsm->encoding = c->encapsulation;
gsm->adaption = c->adaption;
gsm->n2 = c->n2;
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 47d32281032..52fc0c9a636 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -581,8 +581,9 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
__u8 __user *buf, size_t nr)
{
struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
- int ret;
+ int ret = 0;
struct n_hdlc_buf *rbuf;
+ DECLARE_WAITQUEUE(wait, current);
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)n_hdlc_tty_read() called\n",__FILE__,__LINE__);
@@ -598,57 +599,55 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
return -EFAULT;
}
- tty_lock();
+ add_wait_queue(&tty->read_wait, &wait);
for (;;) {
if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {
- tty_unlock();
- return -EIO;
+ ret = -EIO;
+ break;
}
+ if (tty_hung_up_p(file))
+ break;
- n_hdlc = tty2n_hdlc (tty);
- if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC ||
- tty != n_hdlc->tty) {
- tty_unlock();
- return 0;
- }
+ set_current_state(TASK_INTERRUPTIBLE);
rbuf = n_hdlc_buf_get(&n_hdlc->rx_buf_list);
- if (rbuf)
+ if (rbuf) {
+ if (rbuf->count > nr) {
+ /* too large for caller's buffer */
+ ret = -EOVERFLOW;
+ } else {
+ if (copy_to_user(buf, rbuf->buf, rbuf->count))
+ ret = -EFAULT;
+ else
+ ret = rbuf->count;
+ }
+
+ if (n_hdlc->rx_free_buf_list.count >
+ DEFAULT_RX_BUF_COUNT)
+ kfree(rbuf);
+ else
+ n_hdlc_buf_put(&n_hdlc->rx_free_buf_list, rbuf);
break;
+ }
/* no data */
if (file->f_flags & O_NONBLOCK) {
- tty_unlock();
- return -EAGAIN;
+ ret = -EAGAIN;
+ break;
}
-
- interruptible_sleep_on (&tty->read_wait);
+
+ schedule();
+
if (signal_pending(current)) {
- tty_unlock();
- return -EINTR;
+ ret = -EINTR;
+ break;
}
}
-
- if (rbuf->count > nr)
- /* frame too large for caller's buffer (discard frame) */
- ret = -EOVERFLOW;
- else {
- /* Copy the data to the caller's buffer */
- if (copy_to_user(buf, rbuf->buf, rbuf->count))
- ret = -EFAULT;
- else
- ret = rbuf->count;
- }
-
- /* return HDLC buffer to free list unless the free list */
- /* count has exceeded the default value, in which case the */
- /* buffer is freed back to the OS to conserve memory */
- if (n_hdlc->rx_free_buf_list.count > DEFAULT_RX_BUF_COUNT)
- kfree(rbuf);
- else
- n_hdlc_buf_put(&n_hdlc->rx_free_buf_list,rbuf);
- tty_unlock();
+
+ remove_wait_queue(&tty->read_wait, &wait);
+ __set_current_state(TASK_RUNNING);
+
return ret;
} /* end of n_hdlc_tty_read() */
@@ -691,14 +690,15 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
count = maxframe;
}
- tty_lock();
-
add_wait_queue(&tty->write_wait, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
+
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
- /* Allocate transmit buffer */
- /* sleep until transmit buffer available */
- while (!(tbuf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list))) {
+ tbuf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list);
+ if (tbuf)
+ break;
+
if (file->f_flags & O_NONBLOCK) {
error = -EAGAIN;
break;
@@ -719,7 +719,7 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
}
}
- set_current_state(TASK_RUNNING);
+ __set_current_state(TASK_RUNNING);
remove_wait_queue(&tty->write_wait, &wait);
if (!error) {
@@ -731,7 +731,7 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
n_hdlc_buf_put(&n_hdlc->tx_buf_list,tbuf);
n_hdlc_send_frames(n_hdlc,tty);
}
- tty_unlock();
+
return error;
} /* end of n_hdlc_tty_write() */
diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
index be0ebce36e5..de0160e3f8c 100644
--- a/drivers/tty/serial/68328serial.c
+++ b/drivers/tty/serial/68328serial.c
@@ -262,7 +262,7 @@ static void status_handle(struct m68k_serial *info, unsigned short status)
static void receive_chars(struct m68k_serial *info, unsigned short rx)
{
- struct tty_struct *tty = info->port.tty;
+ struct tty_struct *tty = info->tty;
m68328_uart *uart = &uart_addr[info->line];
unsigned char ch, flag;
@@ -329,7 +329,7 @@ static void transmit_chars(struct m68k_serial *info)
goto clear_and_return;
}
- if((info->xmit_cnt <= 0) || info->port.tty->stopped) {
+ if((info->xmit_cnt <= 0) || info->tty->stopped) {
/* That's peculiar... TX ints off */
uart->ustcnt &= ~USTCNT_TX_INTR_MASK;
goto clear_and_return;
@@ -383,7 +383,7 @@ static void do_softint(struct work_struct *work)
struct m68k_serial *info = container_of(work, struct m68k_serial, tqueue);
struct tty_struct *tty;
- tty = info->port.tty;
+ tty = info->tty;
if (!tty)
return;
#if 0
@@ -407,7 +407,7 @@ static void do_serial_hangup(struct work_struct *work)
struct m68k_serial *info = container_of(work, struct m68k_serial, tqueue_hangup);
struct tty_struct *tty;
- tty = info->port.tty;
+ tty = info->tty;
if (!tty)
return;
@@ -451,8 +451,8 @@ static int startup(struct m68k_serial * info)
uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_RX_INTR_MASK;
#endif
- if (info->port.tty)
- clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
+ if (info->tty)
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
/*
@@ -486,8 +486,8 @@ static void shutdown(struct m68k_serial * info)
info->xmit_buf = 0;
}
- if (info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~S_INITIALIZED;
local_irq_restore(flags);
@@ -553,9 +553,9 @@ static void change_speed(struct m68k_serial *info)
unsigned cflag;
int i;
- if (!info->port.tty || !info->port.tty->termios)
+ if (!info->tty || !info->tty->termios)
return;
- cflag = info->port.tty->termios->c_cflag;
+ cflag = info->tty->termios->c_cflag;
if (!(port = info->port))
return;
@@ -970,7 +970,6 @@ static void send_break(struct m68k_serial * info, unsigned int duration)
static int rs_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
{
- int error;
struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
int retval;
@@ -1104,7 +1103,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
tty_ldisc_flush(tty);
tty->closing = 0;
info->event = 0;
- info->port.tty = NULL;
+ info->tty = NULL;
#warning "This is not and has never been valid so fix it"
#if 0
if (tty->ldisc.num != ldiscs[N_TTY].num) {
@@ -1142,7 +1141,7 @@ void rs_hangup(struct tty_struct *tty)
info->event = 0;
info->count = 0;
info->flags &= ~S_NORMAL_ACTIVE;
- info->port.tty = NULL;
+ info->tty = NULL;
wake_up_interruptible(&info->open_wait);
}
@@ -1261,7 +1260,7 @@ int rs_open(struct tty_struct *tty, struct file * filp)
info->count++;
tty->driver_data = info;
- info->port.tty = tty;
+ info->tty = tty;
/*
* Start up serial port
@@ -1338,7 +1337,7 @@ rs68328_init(void)
info = &m68k_soft[i];
info->magic = SERIAL_MAGIC;
info->port = (int) &uart_addr[i];
- info->port.tty = NULL;
+ info->tty = NULL;
info->irq = uart_irqs[i];
info->custom_divisor = 16;
info->close_delay = 50;
diff --git a/drivers/tty/serial/68360serial.c b/drivers/tty/serial/68360serial.c
index 88b13356ec1..bc21eeae8fd 100644
--- a/drivers/tty/serial/68360serial.c
+++ b/drivers/tty/serial/68360serial.c
@@ -2428,6 +2428,7 @@ static const struct tty_operations rs_360_ops = {
/* .read_proc = rs_360_read_proc, */
.tiocmget = rs_360_tiocmget,
.tiocmset = rs_360_tiocmset,
+ .get_icount = rs_360_get_icount,
};
static int __init rs_360_init(void)
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index b25e6e49053..3975df6f7fd 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -236,7 +236,8 @@ static const struct serial8250_config uart_config[] = {
.fifo_size = 128,
.tx_loadsz = 128,
.fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
- .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP,
+ /* UART_CAP_EFR breaks billionon CF bluetooth card. */
+ .flags = UART_CAP_FIFO | UART_CAP_SLEEP,
},
[PORT_16654] = {
.name = "ST16654",
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index b1682d7f1d8..2b8334601c8 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1518,6 +1518,7 @@ config SERIAL_BCM63XX_CONSOLE
config SERIAL_GRLIB_GAISLER_APBUART
tristate "GRLIB APBUART serial support"
depends on OF
+ select SERIAL_CORE
---help---
Add support for the GRLIB APBUART serial port.
diff --git a/drivers/tty/serial/bfin_5xx.c b/drivers/tty/serial/bfin_5xx.c
index e381b895b04..9b1ff2b6bb3 100644
--- a/drivers/tty/serial/bfin_5xx.c
+++ b/drivers/tty/serial/bfin_5xx.c
@@ -370,10 +370,8 @@ static irqreturn_t bfin_serial_rx_int(int irq, void *dev_id)
{
struct bfin_serial_port *uart = dev_id;
- spin_lock(&uart->port.lock);
while (UART_GET_LSR(uart) & DR)
bfin_serial_rx_chars(uart);
- spin_unlock(&uart->port.lock);
return IRQ_HANDLED;
}
@@ -490,9 +488,8 @@ void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart)
{
int x_pos, pos;
- dma_disable_irq(uart->tx_dma_channel);
- dma_disable_irq(uart->rx_dma_channel);
- spin_lock_bh(&uart->port.lock);
+ dma_disable_irq_nosync(uart->rx_dma_channel);
+ spin_lock_bh(&uart->rx_lock);
/* 2D DMA RX buffer ring is used. Because curr_y_count and
* curr_x_count can't be read as an atomic operation,
@@ -523,8 +520,7 @@ void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart)
uart->rx_dma_buf.tail = uart->rx_dma_buf.head;
}
- spin_unlock_bh(&uart->port.lock);
- dma_enable_irq(uart->tx_dma_channel);
+ spin_unlock_bh(&uart->rx_lock);
dma_enable_irq(uart->rx_dma_channel);
mod_timer(&(uart->rx_dma_timer), jiffies + DMA_RX_FLUSH_JIFFIES);
@@ -571,7 +567,7 @@ static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id)
unsigned short irqstat;
int x_pos, pos;
- spin_lock(&uart->port.lock);
+ spin_lock(&uart->rx_lock);
irqstat = get_dma_curr_irqstat(uart->rx_dma_channel);
clear_dma_irqstat(uart->rx_dma_channel);
@@ -589,7 +585,7 @@ static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id)
uart->rx_dma_buf.tail = uart->rx_dma_buf.head;
}
- spin_unlock(&uart->port.lock);
+ spin_unlock(&uart->rx_lock);
return IRQ_HANDLED;
}
@@ -1332,6 +1328,7 @@ static int bfin_serial_probe(struct platform_device *pdev)
}
#ifdef CONFIG_SERIAL_BFIN_DMA
+ spin_lock_init(&uart->rx_lock);
uart->tx_done = 1;
uart->tx_count = 0;
diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c
index beb1afa27d8..7b951adac54 100644
--- a/drivers/tty/serial/max3100.c
+++ b/drivers/tty/serial/max3100.c
@@ -601,7 +601,7 @@ static int max3100_startup(struct uart_port *port)
s->rts = 0;
sprintf(b, "max3100-%d", s->minor);
- s->workqueue = create_freezeable_workqueue(b);
+ s->workqueue = create_freezable_workqueue(b);
if (!s->workqueue) {
dev_warn(&s->spi->dev, "cannot create workqueue\n");
return -EBUSY;
diff --git a/drivers/tty/serial/max3107.c b/drivers/tty/serial/max3107.c
index 910870edf70..750b4f62731 100644
--- a/drivers/tty/serial/max3107.c
+++ b/drivers/tty/serial/max3107.c
@@ -833,7 +833,7 @@ static int max3107_startup(struct uart_port *port)
struct max3107_port *s = container_of(port, struct max3107_port, port);
/* Initialize work queue */
- s->workqueue = create_freezeable_workqueue("max3107");
+ s->workqueue = create_freezable_workqueue("max3107");
if (!s->workqueue) {
dev_err(&s->spi->dev, "Workqueue creation failed\n");
return -EBUSY;
diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c
index a2f2b325449..602d9845c52 100644
--- a/drivers/tty/serial/sb1250-duart.c
+++ b/drivers/tty/serial/sb1250-duart.c
@@ -829,7 +829,7 @@ static void __init sbd_probe_duarts(void)
#ifdef CONFIG_SERIAL_SB1250_DUART_CONSOLE
/*
* Serial console stuff. Very basic, polling driver for doing serial
- * console output. The console_sem is held by the caller, so we
+ * console output. The console_lock is held by the caller, so we
* shouldn't be interrupted for more console activity.
*/
static void sbd_console_putchar(struct uart_port *uport, int ch)
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index c556ed9db13..81f13958e75 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -46,7 +46,7 @@
#include <asm/irq_regs.h>
/* Whether we react on sysrq keys or just ignore them */
-static int __read_mostly sysrq_enabled = 1;
+static int __read_mostly sysrq_enabled = SYSRQ_DEFAULT_ENABLE;
static bool __read_mostly sysrq_always_enabled;
static bool sysrq_on(void)
@@ -571,6 +571,7 @@ struct sysrq_state {
unsigned int alt_use;
bool active;
bool need_reinject;
+ bool reinjecting;
};
static void sysrq_reinject_alt_sysrq(struct work_struct *work)
@@ -581,6 +582,10 @@ static void sysrq_reinject_alt_sysrq(struct work_struct *work)
unsigned int alt_code = sysrq->alt_use;
if (sysrq->need_reinject) {
+ /* we do not want the assignment to be reordered */
+ sysrq->reinjecting = true;
+ mb();
+
/* Simulate press and release of Alt + SysRq */
input_inject_event(handle, EV_KEY, alt_code, 1);
input_inject_event(handle, EV_KEY, KEY_SYSRQ, 1);
@@ -589,6 +594,9 @@ static void sysrq_reinject_alt_sysrq(struct work_struct *work)
input_inject_event(handle, EV_KEY, KEY_SYSRQ, 0);
input_inject_event(handle, EV_KEY, alt_code, 0);
input_inject_event(handle, EV_SYN, SYN_REPORT, 1);
+
+ mb();
+ sysrq->reinjecting = false;
}
}
@@ -599,6 +607,13 @@ static bool sysrq_filter(struct input_handle *handle,
bool was_active = sysrq->active;
bool suppress;
+ /*
+ * Do not filter anything if we are in the process of re-injecting
+ * Alt+SysRq combination.
+ */
+ if (sysrq->reinjecting)
+ return false;
+
switch (type) {
case EV_SYN:
@@ -629,7 +644,7 @@ static bool sysrq_filter(struct input_handle *handle,
sysrq->alt_use = sysrq->alt;
/*
* If nothing else will be pressed we'll need
- * to * re-inject Alt-SysRq keysroke.
+ * to re-inject Alt-SysRq keysroke.
*/
sysrq->need_reinject = true;
}
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 464d09d9787..0065da4b11c 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -3256,8 +3256,8 @@ static ssize_t show_cons_active(struct device *dev,
struct console *c;
ssize_t count = 0;
- acquire_console_sem();
- for (c = console_drivers; c; c = c->next) {
+ console_lock();
+ for_each_console(c) {
if (!c->device)
continue;
if (!c->write)
@@ -3271,7 +3271,7 @@ static ssize_t show_cons_active(struct device *dev,
while (i--)
count += sprintf(buf + count, "%s%d%c",
cs[i]->name, cs[i]->index, i ? ' ':'\n');
- release_console_sem();
+ console_unlock();
return count;
}
@@ -3306,7 +3306,7 @@ int __init tty_init(void)
if (IS_ERR(consdev))
consdev = NULL;
else
- device_create_file(consdev, &dev_attr_active);
+ WARN_ON(device_create_file(consdev, &dev_attr_active) < 0);
#ifdef CONFIG_VT
vty_init(&console_fops);
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index ebae344ce91..c956ed6c83a 100644
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -316,9 +316,9 @@ int paste_selection(struct tty_struct *tty)
/* always called with BTM from vt_ioctl */
WARN_ON(!tty_locked());
- acquire_console_sem();
+ console_lock();
poke_blanked_console();
- release_console_sem();
+ console_unlock();
ld = tty_ldisc_ref(tty);
if (!ld) {
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index eab3a1ff99e..a672ed192d3 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -202,7 +202,7 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
/* Select the proper current console and verify
* sanity of the situation under the console lock.
*/
- acquire_console_sem();
+ console_lock();
attr = (currcons & 128);
currcons = (currcons & 127);
@@ -336,9 +336,9 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
* the pagefault handling code may want to call printk().
*/
- release_console_sem();
+ console_unlock();
ret = copy_to_user(buf, con_buf_start, orig_count);
- acquire_console_sem();
+ console_lock();
if (ret) {
read += (orig_count - ret);
@@ -354,7 +354,7 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
if (read)
ret = read;
unlock_out:
- release_console_sem();
+ console_unlock();
mutex_unlock(&con_buf_mtx);
return ret;
}
@@ -379,7 +379,7 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
/* Select the proper current console and verify
* sanity of the situation under the console lock.
*/
- acquire_console_sem();
+ console_lock();
attr = (currcons & 128);
currcons = (currcons & 127);
@@ -414,9 +414,9 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
/* Temporarily drop the console lock so that we can read
* in the write data from userspace safely.
*/
- release_console_sem();
+ console_unlock();
ret = copy_from_user(con_buf, buf, this_round);
- acquire_console_sem();
+ console_lock();
if (ret) {
this_round -= ret;
@@ -542,7 +542,7 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
vcs_scr_updated(vc);
unlock_out:
- release_console_sem();
+ console_unlock();
mutex_unlock(&con_buf_mtx);
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 76407eca9ab..147ede3423d 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1003,9 +1003,9 @@ static int vt_resize(struct tty_struct *tty, struct winsize *ws)
struct vc_data *vc = tty->driver_data;
int ret;
- acquire_console_sem();
+ console_lock();
ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
- release_console_sem();
+ console_unlock();
return ret;
}
@@ -1271,7 +1271,7 @@ static void default_attr(struct vc_data *vc)
vc->vc_color = vc->vc_def_color;
}
-/* console_sem is held */
+/* console_lock is held */
static void csi_m(struct vc_data *vc)
{
int i;
@@ -1415,7 +1415,7 @@ int mouse_reporting(void)
return vc_cons[fg_console].d->vc_report_mouse;
}
-/* console_sem is held */
+/* console_lock is held */
static void set_mode(struct vc_data *vc, int on_off)
{
int i;
@@ -1485,7 +1485,7 @@ static void set_mode(struct vc_data *vc, int on_off)
}
}
-/* console_sem is held */
+/* console_lock is held */
static void setterm_command(struct vc_data *vc)
{
switch(vc->vc_par[0]) {
@@ -1545,7 +1545,7 @@ static void setterm_command(struct vc_data *vc)
}
}
-/* console_sem is held */
+/* console_lock is held */
static void csi_at(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_cols - vc->vc_x)
@@ -1555,7 +1555,7 @@ static void csi_at(struct vc_data *vc, unsigned int nr)
insert_char(vc, nr);
}
-/* console_sem is held */
+/* console_lock is held */
static void csi_L(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_rows - vc->vc_y)
@@ -1566,7 +1566,7 @@ static void csi_L(struct vc_data *vc, unsigned int nr)
vc->vc_need_wrap = 0;
}
-/* console_sem is held */
+/* console_lock is held */
static void csi_P(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_cols - vc->vc_x)
@@ -1576,7 +1576,7 @@ static void csi_P(struct vc_data *vc, unsigned int nr)
delete_char(vc, nr);
}
-/* console_sem is held */
+/* console_lock is held */
static void csi_M(struct vc_data *vc, unsigned int nr)
{
if (nr > vc->vc_rows - vc->vc_y)
@@ -1587,7 +1587,7 @@ static void csi_M(struct vc_data *vc, unsigned int nr)
vc->vc_need_wrap = 0;
}
-/* console_sem is held (except via vc_init->reset_terminal */
+/* console_lock is held (except via vc_init->reset_terminal */
static void save_cur(struct vc_data *vc)
{
vc->vc_saved_x = vc->vc_x;
@@ -1603,7 +1603,7 @@ static void save_cur(struct vc_data *vc)
vc->vc_saved_G1 = vc->vc_G1_charset;
}
-/* console_sem is held */
+/* console_lock is held */
static void restore_cur(struct vc_data *vc)
{
gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y);
@@ -1625,7 +1625,7 @@ enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
ESpalette };
-/* console_sem is held (except via vc_init()) */
+/* console_lock is held (except via vc_init()) */
static void reset_terminal(struct vc_data *vc, int do_clear)
{
vc->vc_top = 0;
@@ -1685,7 +1685,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
csi_J(vc, 2);
}
-/* console_sem is held */
+/* console_lock is held */
static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
{
/*
@@ -2119,7 +2119,7 @@ static int is_double_width(uint32_t ucs)
return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1);
}
-/* acquires console_sem */
+/* acquires console_lock */
static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
#ifdef VT_BUF_VRAM_ONLY
@@ -2147,11 +2147,11 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
might_sleep();
- acquire_console_sem();
+ console_lock();
vc = tty->driver_data;
if (vc == NULL) {
printk(KERN_ERR "vt: argh, driver_data is NULL !\n");
- release_console_sem();
+ console_unlock();
return 0;
}
@@ -2159,7 +2159,7 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
if (!vc_cons_allocated(currcons)) {
/* could this happen? */
printk_once("con_write: tty %d not allocated\n", currcons+1);
- release_console_sem();
+ console_unlock();
return 0;
}
@@ -2375,7 +2375,7 @@ rescan_last_byte:
}
FLUSH
console_conditional_schedule();
- release_console_sem();
+ console_unlock();
notify_update(vc);
return n;
#undef FLUSH
@@ -2388,11 +2388,11 @@ rescan_last_byte:
* us to do the switches asynchronously (needed when we want
* to switch due to a keyboard interrupt). Synchronization
* with other console code and prevention of re-entrancy is
- * ensured with console_sem.
+ * ensured with console_lock.
*/
static void console_callback(struct work_struct *ignored)
{
- acquire_console_sem();
+ console_lock();
if (want_console >= 0) {
if (want_console != fg_console &&
@@ -2422,7 +2422,7 @@ static void console_callback(struct work_struct *ignored)
}
notify_update(vc_cons[fg_console].d);
- release_console_sem();
+ console_unlock();
}
int set_console(int nr)
@@ -2603,7 +2603,7 @@ static struct console vt_console_driver = {
*/
/*
- * Generally a bit racy with respect to console_sem().
+ * Generally a bit racy with respect to console_lock();.
*
* There are some functions which don't need it.
*
@@ -2629,17 +2629,17 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
switch (type)
{
case TIOCL_SETSEL:
- acquire_console_sem();
+ console_lock();
ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
- release_console_sem();
+ console_unlock();
break;
case TIOCL_PASTESEL:
ret = paste_selection(tty);
break;
case TIOCL_UNBLANKSCREEN:
- acquire_console_sem();
+ console_lock();
unblank_screen();
- release_console_sem();
+ console_unlock();
break;
case TIOCL_SELLOADLUT:
ret = sel_loadlut(p);
@@ -2688,10 +2688,10 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
}
break;
case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
- acquire_console_sem();
+ console_lock();
ignore_poke = 1;
do_blank_screen(0);
- release_console_sem();
+ console_unlock();
break;
case TIOCL_BLANKEDSCREEN:
ret = console_blanked;
@@ -2790,11 +2790,11 @@ static void con_flush_chars(struct tty_struct *tty)
return;
/* if we race with con_close(), vt may be null */
- acquire_console_sem();
+ console_lock();
vc = tty->driver_data;
if (vc)
set_cursor(vc);
- release_console_sem();
+ console_unlock();
}
/*
@@ -2805,7 +2805,7 @@ static int con_open(struct tty_struct *tty, struct file *filp)
unsigned int currcons = tty->index;
int ret = 0;
- acquire_console_sem();
+ console_lock();
if (tty->driver_data == NULL) {
ret = vc_allocate(currcons);
if (ret == 0) {
@@ -2813,7 +2813,7 @@ static int con_open(struct tty_struct *tty, struct file *filp)
/* Still being freed */
if (vc->port.tty) {
- release_console_sem();
+ console_unlock();
return -ERESTARTSYS;
}
tty->driver_data = vc;
@@ -2827,11 +2827,11 @@ static int con_open(struct tty_struct *tty, struct file *filp)
tty->termios->c_iflag |= IUTF8;
else
tty->termios->c_iflag &= ~IUTF8;
- release_console_sem();
+ console_unlock();
return ret;
}
}
- release_console_sem();
+ console_unlock();
return ret;
}
@@ -2844,9 +2844,9 @@ static void con_shutdown(struct tty_struct *tty)
{
struct vc_data *vc = tty->driver_data;
BUG_ON(vc == NULL);
- acquire_console_sem();
+ console_lock();
vc->port.tty = NULL;
- release_console_sem();
+ console_unlock();
tty_shutdown(tty);
}
@@ -2893,13 +2893,13 @@ static int __init con_init(void)
struct vc_data *vc;
unsigned int currcons = 0, i;
- acquire_console_sem();
+ console_lock();
if (conswitchp)
display_desc = conswitchp->con_startup();
if (!display_desc) {
fg_console = 0;
- release_console_sem();
+ console_unlock();
return 0;
}
@@ -2946,7 +2946,7 @@ static int __init con_init(void)
printable = 1;
printk("\n");
- release_console_sem();
+ console_unlock();
#ifdef CONFIG_VT_CONSOLE
register_console(&vt_console_driver);
@@ -2994,7 +2994,7 @@ int __init vty_init(const struct file_operations *console_fops)
if (IS_ERR(tty0dev))
tty0dev = NULL;
else
- device_create_file(tty0dev, &dev_attr_active);
+ WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0);
vcs_init();
@@ -3037,7 +3037,7 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
if (!try_module_get(owner))
return -ENODEV;
- acquire_console_sem();
+ console_lock();
/* check if driver is registered */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@@ -3122,7 +3122,7 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
retval = 0;
err:
- release_console_sem();
+ console_unlock();
module_put(owner);
return retval;
};
@@ -3171,7 +3171,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
if (!try_module_get(owner))
return -ENODEV;
- acquire_console_sem();
+ console_lock();
/* check if driver is registered and if it is unbindable */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@@ -3185,7 +3185,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
}
if (retval) {
- release_console_sem();
+ console_unlock();
goto err;
}
@@ -3204,12 +3204,12 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
}
if (retval) {
- release_console_sem();
+ console_unlock();
goto err;
}
if (!con_is_bound(csw)) {
- release_console_sem();
+ console_unlock();
goto err;
}
@@ -3238,7 +3238,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
if (!con_is_bound(csw))
con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
- release_console_sem();
+ console_unlock();
/* ignore return value, binding should not fail */
bind_con_driver(defcsw, first, last, deflt);
err:
@@ -3538,14 +3538,14 @@ int register_con_driver(const struct consw *csw, int first, int last)
if (!try_module_get(owner))
return -ENODEV;
- acquire_console_sem();
+ console_lock();
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
con_driver = &registered_con_driver[i];
/* already registered */
if (con_driver->con == csw)
- retval = -EINVAL;
+ retval = -EBUSY;
}
if (retval)
@@ -3592,7 +3592,7 @@ int register_con_driver(const struct consw *csw, int first, int last)
}
err:
- release_console_sem();
+ console_unlock();
module_put(owner);
return retval;
}
@@ -3613,7 +3613,7 @@ int unregister_con_driver(const struct consw *csw)
{
int i, retval = -ENODEV;
- acquire_console_sem();
+ console_lock();
/* cannot unregister a bound driver */
if (con_is_bound(csw))
@@ -3639,7 +3639,7 @@ int unregister_con_driver(const struct consw *csw)
}
}
err:
- release_console_sem();
+ console_unlock();
return retval;
}
EXPORT_SYMBOL(unregister_con_driver);
@@ -3656,7 +3656,12 @@ int take_over_console(const struct consw *csw, int first, int last, int deflt)
int err;
err = register_con_driver(csw, first, last);
-
+ /* if we get an busy error we still want to bind the console driver
+ * and return success, as we may have unbound the console driver
+  * but not unregistered it.
+ */
+ if (err == -EBUSY)
+ err = 0;
if (!err)
bind_con_driver(csw, first, last, deflt);
@@ -3934,9 +3939,9 @@ int con_set_cmap(unsigned char __user *arg)
{
int rc;
- acquire_console_sem();
+ console_lock();
rc = set_get_cmap (arg,1);
- release_console_sem();
+ console_unlock();
return rc;
}
@@ -3945,9 +3950,9 @@ int con_get_cmap(unsigned char __user *arg)
{
int rc;
- acquire_console_sem();
+ console_lock();
rc = set_get_cmap (arg,0);
- release_console_sem();
+ console_unlock();
return rc;
}
@@ -3994,12 +3999,12 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
} else
font.data = NULL;
- acquire_console_sem();
+ console_lock();
if (vc->vc_sw->con_font_get)
rc = vc->vc_sw->con_font_get(vc, &font);
else
rc = -ENOSYS;
- release_console_sem();
+ console_unlock();
if (rc)
goto out;
@@ -4076,12 +4081,12 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
font.data = memdup_user(op->data, size);
if (IS_ERR(font.data))
return PTR_ERR(font.data);
- acquire_console_sem();
+ console_lock();
if (vc->vc_sw->con_font_set)
rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
else
rc = -ENOSYS;
- release_console_sem();
+ console_unlock();
kfree(font.data);
return rc;
}
@@ -4103,12 +4108,12 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op)
else
name[MAX_FONT_NAME - 1] = 0;
- acquire_console_sem();
+ console_lock();
if (vc->vc_sw->con_font_default)
rc = vc->vc_sw->con_font_default(vc, &font, s);
else
rc = -ENOSYS;
- release_console_sem();
+ console_unlock();
if (!rc) {
op->width = font.width;
op->height = font.height;
@@ -4124,7 +4129,7 @@ static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
if (vc->vc_mode != KD_TEXT)
return -EINVAL;
- acquire_console_sem();
+ console_lock();
if (!vc->vc_sw->con_font_copy)
rc = -ENOSYS;
else if (con < 0 || !vc_cons_allocated(con))
@@ -4133,7 +4138,7 @@ static int con_font_copy(struct vc_data *vc, struct console_font_op *op)
rc = 0;
else
rc = vc->vc_sw->con_font_copy(vc, con);
- release_console_sem();
+ console_unlock();
return rc;
}
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 6b68a0fb461..1235ebda6e1 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -649,12 +649,12 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
/*
* explicitly blank/unblank the screen if switching modes
*/
- acquire_console_sem();
+ console_lock();
if (arg == KD_TEXT)
do_unblank_screen(1);
else
do_blank_screen(1);
- release_console_sem();
+ console_unlock();
break;
case KDGETMODE:
@@ -893,7 +893,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
ret = -EINVAL;
goto out;
}
- acquire_console_sem();
+ console_lock();
vc->vt_mode = tmp;
/* the frsig is ignored, so we set it to 0 */
vc->vt_mode.frsig = 0;
@@ -901,7 +901,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
vc->vt_pid = get_pid(task_pid(current));
/* no switch is required -- saw@shade.msu.ru */
vc->vt_newvt = -1;
- release_console_sem();
+ console_unlock();
break;
}
@@ -910,9 +910,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
struct vt_mode tmp;
int rc;
- acquire_console_sem();
+ console_lock();
memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode));
- release_console_sem();
+ console_unlock();
rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));
if (rc)
@@ -965,9 +965,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
ret = -ENXIO;
else {
arg--;
- acquire_console_sem();
+ console_lock();
ret = vc_allocate(arg);
- release_console_sem();
+ console_unlock();
if (ret)
break;
set_console(arg);
@@ -990,7 +990,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
ret = -ENXIO;
else {
vsa.console--;
- acquire_console_sem();
+ console_lock();
ret = vc_allocate(vsa.console);
if (ret == 0) {
struct vc_data *nvc;
@@ -1003,7 +1003,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
put_pid(nvc->vt_pid);
nvc->vt_pid = get_pid(task_pid(current));
}
- release_console_sem();
+ console_unlock();
if (ret)
break;
/* Commence switch and lock */
@@ -1044,7 +1044,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
/*
* Switching-from response
*/
- acquire_console_sem();
+ console_lock();
if (vc->vt_newvt >= 0) {
if (arg == 0)
/*
@@ -1063,7 +1063,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
vc->vt_newvt = -1;
ret = vc_allocate(newvt);
if (ret) {
- release_console_sem();
+ console_unlock();
break;
}
/*
@@ -1083,7 +1083,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
if (arg != VT_ACKACQ)
ret = -EINVAL;
}
- release_console_sem();
+ console_unlock();
break;
/*
@@ -1096,20 +1096,20 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
}
if (arg == 0) {
/* deallocate all unused consoles, but leave 0 */
- acquire_console_sem();
+ console_lock();
for (i=1; i<MAX_NR_CONSOLES; i++)
if (! VT_BUSY(i))
vc_deallocate(i);
- release_console_sem();
+ console_unlock();
} else {
/* deallocate a single console, if possible */
arg--;
if (VT_BUSY(arg))
ret = -EBUSY;
else if (arg) { /* leave 0 */
- acquire_console_sem();
+ console_lock();
vc_deallocate(arg);
- release_console_sem();
+ console_unlock();
}
}
break;
@@ -1126,7 +1126,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
get_user(cc, &vtsizes->v_cols))
ret = -EFAULT;
else {
- acquire_console_sem();
+ console_lock();
for (i = 0; i < MAX_NR_CONSOLES; i++) {
vc = vc_cons[i].d;
@@ -1135,7 +1135,7 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
vc_resize(vc_cons[i].d, cc, ll);
}
}
- release_console_sem();
+ console_unlock();
}
break;
}
@@ -1187,14 +1187,14 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (!vc_cons[i].d)
continue;
- acquire_console_sem();
+ console_lock();
if (vlin)
vc_cons[i].d->vc_scan_lines = vlin;
if (clin)
vc_cons[i].d->vc_font.height = clin;
vc_cons[i].d->vc_resize_user = 1;
vc_resize(vc_cons[i].d, cc, ll);
- release_console_sem();
+ console_unlock();
}
break;
}
@@ -1367,7 +1367,7 @@ void vc_SAK(struct work_struct *work)
struct vc_data *vc;
struct tty_struct *tty;
- acquire_console_sem();
+ console_lock();
vc = vc_con->d;
if (vc) {
tty = vc->port.tty;
@@ -1379,7 +1379,7 @@ void vc_SAK(struct work_struct *work)
__do_SAK(tty);
reset_vc(vc);
}
- release_console_sem();
+ console_unlock();
}
#ifdef CONFIG_COMPAT
@@ -1737,10 +1737,10 @@ int vt_move_to_console(unsigned int vt, int alloc)
{
int prev;
- acquire_console_sem();
+ console_lock();
/* Graphics mode - up to X */
if (disable_vt_switch) {
- release_console_sem();
+ console_unlock();
return 0;
}
prev = fg_console;
@@ -1748,7 +1748,7 @@ int vt_move_to_console(unsigned int vt, int alloc)
if (alloc && vc_allocate(vt)) {
/* we can't have a free VC for now. Too bad,
* we don't want to mess the screen for now. */
- release_console_sem();
+ console_unlock();
return -ENOSPC;
}
@@ -1758,10 +1758,10 @@ int vt_move_to_console(unsigned int vt, int alloc)
* Let the calling function know so it can decide
* what to do.
*/
- release_console_sem();
+ console_unlock();
return -EIO;
}
- release_console_sem();
+ console_unlock();
tty_lock();
if (vt_waitactive(vt + 1)) {
pr_debug("Suspend: Can't switch VCs.");
@@ -1781,8 +1781,8 @@ int vt_move_to_console(unsigned int vt, int alloc)
*/
void pm_set_vt_switch(int do_switch)
{
- acquire_console_sem();
+ console_lock();
disable_vt_switch = !do_switch;
- release_console_sem();
+ console_unlock();
}
EXPORT_SYMBOL(pm_set_vt_switch);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-14 12:39:08 +0000