diff options
Diffstat (limited to 'drivers/char/virtio_console.c')
| -rw-r--r-- | drivers/char/virtio_console.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 896a2ced1d2..84b164d1eb2 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1,6 +1,7 @@ /* * Copyright (C) 2006, 2007, 2009 Rusty Russell, IBM Corporation - * Copyright (C) 2009, 2010 Red Hat, Inc. + * Copyright (C) 2009, 2010, 2011 Red Hat, Inc. + * Copyright (C) 2009, 2010, 2011 Amit Shah <amit.shah@redhat.com> * * 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 @@ -31,7 +32,7 @@ #include <linux/virtio_console.h> #include <linux/wait.h> #include <linux/workqueue.h> -#include "hvc_console.h" +#include "../tty/hvc/hvc_console.h" /* * This is a global struct for storing common data for all the devices @@ -387,6 +388,10 @@ static void discard_port_data(struct port *port) unsigned int len; int ret; + if (!port->portdev) { + /* Device has been unplugged. vqs are already gone. */ + return; + } vq = port->in_vq; if (port->inbuf) buf = port->inbuf; @@ -469,6 +474,10 @@ static void reclaim_consumed_buffers(struct port *port) void *buf; unsigned int len; + if (!port->portdev) { + /* Device has been unplugged. vqs are already gone. */ + return; + } while ((buf = virtqueue_get_buf(port->out_vq, &len))) { kfree(buf); port->outvq_full = false; @@ -1462,6 +1471,17 @@ static void control_work_handler(struct work_struct *work) spin_unlock(&portdev->cvq_lock); } +static void out_intr(struct virtqueue *vq) +{ + struct port *port; + + port = find_port_by_vq(vq->vdev->priv, vq); + if (!port) + return; + + wake_up_interruptible(&port->waitqueue); +} + static void in_intr(struct virtqueue *vq) { struct port *port; @@ -1566,7 +1586,7 @@ static int init_vqs(struct ports_device *portdev) */ j = 0; io_callbacks[j] = in_intr; - io_callbacks[j + 1] = NULL; + io_callbacks[j + 1] = out_intr; io_names[j] = "input"; io_names[j + 1] = "output"; j += 2; @@ -1580,7 +1600,7 @@ static int init_vqs(struct ports_device *portdev) for (i = 1; i < nr_ports; i++) { j += 2; io_callbacks[j] = in_intr; - io_callbacks[j + 1] = NULL; + io_callbacks[j + 1] = out_intr; io_names[j] = "input"; io_names[j + 1] = "output"; } |