From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Tue, 11 Feb 2014 10:03:31 +0000 (+0100)
Subject: mfd: max77686: Fix possible NULL pointer dereference on i2c_new_dummy error
X-Git-Tag: v3.15-rc1~64^2~75
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9e183a1d495cd65412abe0f9df19b151716bfe7;p=pandora-kernel.git

mfd: max77686: Fix possible NULL pointer dereference on i2c_new_dummy error

During probe the driver allocates dummy I2C device for RTC with
i2c_new_dummy() but it does not check the return value of this call.

In case of error (i2c_new_device(): memory allocation failure or I2C
address cannot be used) this function returns NULL which is later used
by i2c_unregister_device().

If i2c_new_dummy() fails for RTC device, fail also the probe for main
MFD driver.

Cc: stable@vger.kernel.org
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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