On Wednesday 06 February 2013 12:42:56 Dan Williams wrote:
> As part of the initialization sequence, the driver sends a SYNC message
> via the control pipe to the firmware, which appears to request a
> firmware restart. The firmware responds with an indication via the
> interrupt pipe set up by usbnet. If the driver does not receive a
> RESTART indication within a certain amount of time, it will periodically
> send additional SYNC messages until it receives the RESTART indication.
>
> Unfortunately, the interrupt URB is only submitted while the netdev
> is open, which is usually not the case during initialization, and thus
> the firmware's RESTART indication is lost. So the driver continues
> sending SYNC messages, and eventually the firmware crashes when it
> receives too many. This leads to a wedged netdev.
If I understand this correctly we should stop the interrupt pipe once
RESTART has been recieved. I am afraid this patch is a bit inefficient.
Regards
Oliver
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
