From: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
Date: Thu, 13 Oct 2011 11:29:24 +0000 (+0000)
Subject: caif-hsi: Fix for wakeup condition problem
X-Git-Tag: v3.2-rc1~182^2~82
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=73033c987a8bd0b080509063bb7c130b8941ad73;p=pandora-kernel.git

caif-hsi: Fix for wakeup condition problem

Under stressed conditions a race could happen when del_timer_sync() was called
from softirq context at the same time when mod_timer_pending() for the same
timer was called from the workqueue. This leaded to a state mismatch in the
CAIF HSI driver and following unexpected link wakeup procedure.

The fix puts del_timer_sync() and mod_timer_pending() calls under a spin lock
to protect against the race condition.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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