From: Guenter Roeck <linux@roeck-us.net>
Date: Thu, 20 Mar 2014 15:12:28 +0000 (-0700)
Subject: mfd: kempld-core: Fix potential hang-up during boot
X-Git-Tag: v3.15-rc1~64^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=204747c970c0d568721c76ab8a57dde0e5dcf0d5;p=pandora-kernel.git

mfd: kempld-core: Fix potential hang-up during boot

On PXT and COMe-cPC2 boards it is observed that the hardware
mutex is acquired but not being released during initialization.
This can result in a hang-up during boot if the driver is built
into the kernel.

Releasing the mutex twice if it was acquired fixes the problem.
Subsequent request/release cycles work as expected, so the fix is
only needed during initialization.

Cc: <stable@vger.kernel.org>
Reviewed-by: Michael Brunner <michael.brunner@kontron.com>
Tested-by: Michael Brunner <michael.brunner@kontron.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---

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