tree bca721d4235a676cd4cfbfc0d467c9bce5b39fc2
parent e6ca7b89dc76abf77c80887fed54e0a60c87c0a8
author Alexandre Bounine <alexandre.bounine@idt.com> 1330988361 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1330991383 -0800

rapidio/tsi721: fix queue wrapping bug in inbound doorbell handler

Fix a bug that causes a kernel panic when the number of received doorbells
is larger than number of entries in the inbound doorbell queue (current
default value = 512).

Another possible indication for this bug is large number of spurious
doorbells reported by tsi721 driver after reaching the queue size maximum.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Chul Kim <chul.kim@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: <stable@vger.kernel.org>		[3.2.x+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>