From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Tue, 11 Feb 2014 10:03:34 +0000 (+0100)
Subject: mfd: max8997: Fix possible NULL pointer dereference on i2c_new_dummy error
X-Git-Tag: v3.2.58~44
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=792aa59f009d781878bd509ecc8fa65a94dfb4ab;p=pandora-kernel.git

mfd: max8997: Fix possible NULL pointer dereference on i2c_new_dummy error

commit 97dc4ed3fa377ec91bb60ba98b70d645c2099384 upstream.

During probe the driver allocates dummy I2C devices for RTC, haptic and
MUIC with i2c_new_dummy() but it does not check the return value of this
calls.

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, haptic or MUIC devices, fail also the
probe for main MFD driver.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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