On Mon, Apr 14, 2014 at 09:58:12PM +0200, Johan Hovold wrote: > The current ACM runtime-suspend implementation is broken in several > ways: > > Firstly, it buffers only the first write request being made while > suspended -- any further writes are silently dropped. > > Secondly, writes being dropped also leak write urbs, which are never > reclaimed (until the device is unbound). > > Thirdly, even the single buffered write is not cleared at shutdown > (which may happen before the device is resumed), something which can > lead to another urb leak as well as a PM usage-counter leak. > > Fix this by implementing a delayed-write queue using urb anchors and > making sure to discard the queue properly at shutdown. > > Reported-by: Xiao Jin <jin.xiao@xxxxxxxxx> > Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx> Greg, I understand yoǘ're on your way home from Japan and are getting ready to work through the 3.16 patch queue. Could you please discard this one for now? I've found a couple of more PM related problems and I'll submit a slight update of this one as part of a larger series of fixes instead. Thanks, Johan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
