[17/46] USB: Fix throttling in generic usbserial driver

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Joris van Rantwijk <jorispubl@xxxxxxxxx>

commit 63a9609513007537a0b23ac511fd73f9bd609ea0 upstream.

The generic usbserial driver in Linux 2.6.31 halts its receiving
channel in response to throttle requests from the line discipline.
Unfortunately it drops the contents of the first URB received after
throttling takes effect. This patch corrects that problem.

Signed-off-by: Joris van Rantwijk <jorispubl@xxxxxxxxx>
Acked-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/usb/serial/generic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -530,7 +530,7 @@ void usb_serial_generic_unthrottle(struc
 
 	if (was_throttled) {
 		/* Resume reading from device */
-		usb_serial_generic_resubmit_read_urb(port, GFP_KERNEL);
+		flush_and_resubmit_read_urb(port);
 	}
 }
 


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