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Commit 238ebd13 authored by Elina Pasheva's avatar Elina Pasheva Committed by Greg Kroah-Hartman
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USB: serial: sierra driver zero length packet fix 



- Fixed a problem with transferring packets with size a multiple of Bulk
  Xfer size in function sierra_write(). Added transfer flag
  URB_ZERO_PACKET before submitting the urb to trigger Zero-length data
  transfer when packet size is a multiple of Bulk Xfer.

Signed-off-by: default avatarElina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 72fda3ca

drivers/usb/serial/sierra.c

+4 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ 
  Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>

*/



#define DRIVER_VERSION "v.1.3.6"

#define DRIVER_VERSION "v.1.3.7"

#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"

#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
@@ -474,6 +474,9 @@ static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port, 
					  port->bulk_out_endpointAddress),

			  buffer, writesize, sierra_outdat_callback, port);



	/* Handle the need to send a zero length packet */

	urb->transfer_flags |= URB_ZERO_PACKET;



	/* send it down the pipe */

	retval = usb_submit_urb(urb, GFP_ATOMIC);

	if (retval) {