From 5b0380c94a2e888b7858fbec6fc3ac623bc9b05a Mon Sep 17 00:00:00 2001
From: Nat Gurumoorthy <natg@google.com>
Date: Wed, 25 May 2011 20:43:33 +0200
Subject: [PATCH] hwmon: (it87) Use request_muxed_region

Serialize access to the hardware by using "request_muxed_region" macro
defined by Alan Cox. Call to this macro will hold off the requestor if
the resource is currently busy. "superio_enter" will return an error
if call to "request_muxed_region" fails. Rest of the code change is to
ripple an error return from superio_enter to the top level.

Signed-off-by: Nat Gurumoorthy <natg@google.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
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