From: Kirill Kapranov <[email protected]> Add waiting for an URB transmit finish that let the last URB to be sent (to be not discarded) during 'release' procedure. W/o this waiting,the last frame will be nearly always lost.
A test case: an attempt of sending a single frame: echo -en "\001mk255" >/dev/adutux0 Signed-off-by: Kirill Kapranov <[email protected]> --- drivers/usb/misc/adutux.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c index 4b87127..9669377 100644 --- a/drivers/usb/misc/adutux.c +++ b/drivers/usb/misc/adutux.c @@ -132,6 +132,8 @@ static void adu_abort_transfers(struct adu_device *dev) spin_lock_irqsave(&dev->buflock, flags); if (!dev->out_urb_finished) { spin_unlock_irqrestore(&dev->buflock, flags); + wait_event_timeout(dev->write_wait, dev->out_urb_finished, + COMMAND_TIMEOUT); usb_kill_urb(dev->interrupt_out_urb); } else spin_unlock_irqrestore(&dev->buflock, flags); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
