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USB: serial: remove unnecessary re-initialisation of generic urbs 

The generic read and write bulk urbs are initialised when allocated in
usb_serial_probe. The only field that needs to be updated after that is
the transfer_buffer_length of the write urb.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johan Hovold 2010-03-17 23:05:54 +01:00 committed by Greg Kroah-Hartman
parent 41bd72f904
commit 056afc0f01
1 changed files with 2 additions and 23 deletions
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25
drivers/usb/serial/generic.c
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@ -256,7 +256,6 @@ error_no_buffer:
*/
static int usb_serial_generic_write_start(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
unsigned char *data;
int result;
int count;
@ -281,15 +280,7 @@ static int usb_serial_generic_write_start(struct usb_serial_port *port)
count = kfifo_out_locked(&port->write_fifo, data, port->bulk_out_size, &port->lock);
usb_serial_debug_data(debug, &port->dev, __func__, count, data);
/* set up our urb */
usb_fill_bulk_urb(port->write_urb, serial->dev,
usb_sndbulkpipe(serial->dev,
port->bulk_out_endpointAddress),
port->write_urb->transfer_buffer, count,
((serial->type->write_bulk_callback) ?
serial->type->write_bulk_callback :
usb_serial_generic_write_bulk_callback),
port);
port->write_urb->transfer_buffer_length = count;
/* send the data out the bulk port */
result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
@ -405,21 +396,9 @@ int usb_serial_generic_chars_in_buffer(struct tty_struct *tty)
int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,
gfp_t mem_flags)
{
struct urb *urb = port->read_urb;
struct usb_serial *serial = port->serial;
int result;
/* Continue reading from device */
usb_fill_bulk_urb(urb, serial->dev,
usb_rcvbulkpipe(serial->dev,
port->bulk_in_endpointAddress),
urb->transfer_buffer,
urb->transfer_buffer_length,
((serial->type->read_bulk_callback) ?
serial->type->read_bulk_callback :
usb_serial_generic_read_bulk_callback), port);
result = usb_submit_urb(urb, mem_flags);
result = usb_submit_urb(port->read_urb, mem_flags);
if (result && result != -EPERM) {
dev_err(&port->dev,
"%s - failed submitting read urb, error %d\n",