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path: root/drivers/usb/serial/usb-serial.c
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Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
-rw-r--r--drivers/usb/serial/usb-serial.c98
1 files changed, 50 insertions, 48 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index cc274fdf262..ce6c1a65a54 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -50,7 +50,7 @@ static struct usb_driver usb_serial_driver = {
.disconnect = usb_serial_disconnect,
.suspend = usb_serial_suspend,
.resume = usb_serial_resume,
- .no_dynamic_id = 1,
+ .no_dynamic_id = 1,
.supports_autosuspend = 1,
};
@@ -260,6 +260,10 @@ static int serial_activate(struct tty_port *tport, struct tty_struct *tty)
else
retval = port->serial->type->open(tty, port);
mutex_unlock(&serial->disc_mutex);
+
+ if (retval < 0)
+ retval = usb_translate_errors(retval);
+
return retval;
}
@@ -360,7 +364,8 @@ static int serial_write(struct tty_struct *tty, const unsigned char *buf,
/* pass on to the driver specific version of this function */
retval = port->serial->type->write(tty, port, buf, count);
-
+ if (retval < 0)
+ retval = usb_translate_errors(retval);
exit:
return retval;
}
@@ -562,8 +567,8 @@ static void kill_traffic(struct usb_serial_port *port)
{
int i;
- usb_kill_urb(port->read_urb);
- usb_kill_urb(port->write_urb);
+ for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
+ usb_kill_urb(port->read_urbs[i]);
for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)
usb_kill_urb(port->write_urbs[i]);
/*
@@ -595,17 +600,17 @@ static void port_release(struct device *dev)
kill_traffic(port);
cancel_work_sync(&port->work);
- usb_free_urb(port->read_urb);
- usb_free_urb(port->write_urb);
usb_free_urb(port->interrupt_in_urb);
usb_free_urb(port->interrupt_out_urb);
+ for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
+ usb_free_urb(port->read_urbs[i]);
+ kfree(port->bulk_in_buffers[i]);
+ }
for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {
usb_free_urb(port->write_urbs[i]);
kfree(port->bulk_out_buffers[i]);
}
kfifo_free(&port->write_fifo);
- kfree(port->bulk_in_buffer);
- kfree(port->bulk_out_buffer);
kfree(port->interrupt_in_buffer);
kfree(port->interrupt_out_buffer);
kfree(port);
@@ -686,16 +691,18 @@ static int serial_carrier_raised(struct tty_port *port)
{
struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
struct usb_serial_driver *drv = p->serial->type;
+
if (drv->carrier_raised)
return drv->carrier_raised(p);
/* No carrier control - don't block */
- return 1;
+ return 1;
}
static void serial_dtr_rts(struct tty_port *port, int on)
{
struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
struct usb_serial_driver *drv = p->serial->type;
+
if (drv->dtr_rts)
drv->dtr_rts(p, on);
}
@@ -724,6 +731,7 @@ int usb_serial_probe(struct usb_interface *interface,
unsigned int minor;
int buffer_size;
int i;
+ int j;
int num_interrupt_in = 0;
int num_interrupt_out = 0;
int num_bulk_in = 0;
@@ -906,38 +914,41 @@ int usb_serial_probe(struct usb_interface *interface,
for (i = 0; i < num_bulk_in; ++i) {
endpoint = bulk_in_endpoint[i];
port = serial->port[i];
- port->read_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!port->read_urb) {
- dev_err(&interface->dev, "No free urbs available\n");
- goto probe_error;
- }
buffer_size = max_t(int, serial->type->bulk_in_size,
usb_endpoint_maxp(endpoint));
port->bulk_in_size = buffer_size;
port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
- port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
- if (!port->bulk_in_buffer) {
- dev_err(&interface->dev,
+
+ for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) {
+ set_bit(j, &port->read_urbs_free);
+ port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
+ if (!port->read_urbs[j]) {
+ dev_err(&interface->dev,
+ "No free urbs available\n");
+ goto probe_error;
+ }
+ port->bulk_in_buffers[j] = kmalloc(buffer_size,
+ GFP_KERNEL);
+ if (!port->bulk_in_buffers[j]) {
+ dev_err(&interface->dev,
"Couldn't allocate bulk_in_buffer\n");
- goto probe_error;
- }
- usb_fill_bulk_urb(port->read_urb, dev,
- usb_rcvbulkpipe(dev,
+ goto probe_error;
+ }
+ usb_fill_bulk_urb(port->read_urbs[j], dev,
+ usb_rcvbulkpipe(dev,
endpoint->bEndpointAddress),
- port->bulk_in_buffer, buffer_size,
- serial->type->read_bulk_callback, port);
+ port->bulk_in_buffers[j], buffer_size,
+ serial->type->read_bulk_callback,
+ port);
+ }
+
+ port->read_urb = port->read_urbs[0];
+ port->bulk_in_buffer = port->bulk_in_buffers[0];
}
for (i = 0; i < num_bulk_out; ++i) {
- int j;
-
endpoint = bulk_out_endpoint[i];
port = serial->port[i];
- port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!port->write_urb) {
- dev_err(&interface->dev, "No free urbs available\n");
- goto probe_error;
- }
if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL))
goto probe_error;
buffer_size = serial->type->bulk_out_size;
@@ -945,17 +956,7 @@ int usb_serial_probe(struct usb_interface *interface,
buffer_size = usb_endpoint_maxp(endpoint);
port->bulk_out_size = buffer_size;
port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
- port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
- if (!port->bulk_out_buffer) {
- dev_err(&interface->dev,
- "Couldn't allocate bulk_out_buffer\n");
- goto probe_error;
- }
- usb_fill_bulk_urb(port->write_urb, dev,
- usb_sndbulkpipe(dev,
- endpoint->bEndpointAddress),
- port->bulk_out_buffer, buffer_size,
- serial->type->write_bulk_callback, port);
+
for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
set_bit(j, &port->write_urbs_free);
port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
@@ -978,6 +979,9 @@ int usb_serial_probe(struct usb_interface *interface,
serial->type->write_bulk_callback,
port);
}
+
+ port->write_urb = port->write_urbs[0];
+ port->bulk_out_buffer = port->bulk_out_buffers[0];
}
if (serial->type->read_int_callback) {
@@ -1196,7 +1200,7 @@ static const struct tty_operations serial_ops = {
.open = serial_open,
.close = serial_close,
.write = serial_write,
- .hangup = serial_hangup,
+ .hangup = serial_hangup,
.write_room = serial_write_room,
.ioctl = serial_ioctl,
.set_termios = serial_set_termios,
@@ -1206,9 +1210,9 @@ static const struct tty_operations serial_ops = {
.chars_in_buffer = serial_chars_in_buffer,
.tiocmget = serial_tiocmget,
.tiocmset = serial_tiocmset,
- .get_icount = serial_get_icount,
- .cleanup = serial_cleanup,
- .install = serial_install,
+ .get_icount = serial_get_icount,
+ .cleanup = serial_cleanup,
+ .install = serial_install,
.proc_fops = &serial_proc_fops,
};
@@ -1237,7 +1241,7 @@ static int __init usb_serial_init(void)
usb_serial_tty_driver->owner = THIS_MODULE;
usb_serial_tty_driver->driver_name = "usbserial";
- usb_serial_tty_driver->name = "ttyUSB";
+ usb_serial_tty_driver->name = "ttyUSB";
usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
usb_serial_tty_driver->minor_start = 0;
usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
@@ -1336,7 +1340,6 @@ static void fixup_generic(struct usb_serial_driver *device)
int usb_serial_register(struct usb_serial_driver *driver)
{
- /* must be called with BKL held */
int retval;
if (usb_disabled())
@@ -1374,7 +1377,6 @@ EXPORT_SYMBOL_GPL(usb_serial_register);
void usb_serial_deregister(struct usb_serial_driver *device)
{
- /* must be called with BKL held */
printk(KERN_INFO "USB Serial deregistering driver %s\n",
device->description);
mutex_lock(&table_lock);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-04 04:33:59 +0000