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authorElina Pasheva <epasheva@sierrawireless.com>2009-05-12 13:12:24 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2009-06-15 21:44:45 -0700
commit238ebd138c9704e1162030c1e600bc06142cb2c8 (patch)
tree9e069a3e31e6471e9d62ee7938aa39a4daa300fd /drivers/usb/serial
parent72fda3ca6fc14662bb385d1e39e9e00af15b200d (diff)
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: Elina Pasheva <epasheva@sierrawireless.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial')
-rw-r--r--drivers/usb/serial/sierra.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index f494c5f659e..9d11fe47633 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -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) {