From: Elina Pasheva <epasheva@xxxxxxxxxxxxxxxxxx>
- 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@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/serial/sierra.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index f494c5f..9d11fe4 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@xxxxxxxxxxxx>
*/
-#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) {
--
1.6.3.2
--
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