From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Tue, 11 Feb 2014 10:03:32 +0000 (+0100)
Subject: mfd: max77693: Fix possible NULL pointer dereference on i2c_new_dummy error
X-Git-Tag: v3.15-rc1~64^2~70
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad09dd6a1f5d6244bd89314015af506ba7f9810a;p=pandora-kernel.git

mfd: max77693: Fix possible NULL pointer dereference on i2c_new_dummy error

During probe the driver allocates dummy I2C devices for MUIC and haptic
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 devm_regmap_init_i2c() and i2c_unregister_device().

If i2c_new_dummy() fails for MUIC or haptic devices, 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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