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USB: adutux: Add waiting in transfer abortion

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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 <kirill.kirillovich.kapranov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kirill Kapranov 2018-02-17 23:01:40 +02:00 committed by Greg Kroah-Hartman
parent 092bd5c2b9
commit 687ca6395f
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/misc/adutux.c
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@ -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);