From: Aaro Koskinen <aaro.koskinen@nokia.com>
Date: Thu, 24 Mar 2011 06:48:19 +0000 (-0700)
Subject: Input: tsc2005 - fix locking issue
X-Git-Tag: v2.6.39-rc1~58^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a0fa2206f550066d6948d43c5401e973e5f7d320;p=pandora-kernel.git

Input: tsc2005 - fix locking issue

Commit 0b950d3 (Input: tsc2005 - add open/close) introduced a
locking issue with the ESD watchdog: __tsc2005_disable() is calling
cancel_delayed_work_sync() with mutex held, and the work also needs the
same mutex.

Fix the problem by using mutex_trylock() in tsc2005_esd_work(). If the
mutex is taken, we know we are in the middle of disable or enable and
the watchdog check can be skipped.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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