common i/o layer change:
 - Correct check in qdio_stop_polling to avoid loosing initiative on the
   qdio inbound queue.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>