From: Kirill Kapranov <kirill.kirillovich.kapranov@xxxxxxxxx>
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@xxxxxxxxx>
---
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
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