From c52ae3d2794ee2a248245a9e5a26f717e1c401f5 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@roeck-us.net>
Date: Fri, 13 Sep 2013 10:42:39 -0700
Subject: [PATCH] hwmon: (gpio_fan) Use error value returned from
 get_fan_speed_index()

get_fan_speed_index() returns -EINVAL in case of errors, only to have it
ignored and replaced with -ENODEV. Make it return -ENODEV and use it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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