mfd: max77686: Fix possible NULL pointer dereference on i2c_new_dummy error
authorKrzysztof Kozlowski <k.kozlowski@samsung.com>
Tue, 11 Feb 2014 10:03:31 +0000 (11:03 +0100)
committerLee Jones <lee.jones@linaro.org>
Wed, 19 Mar 2014 08:58:09 +0000 (08:58 +0000)
commitb9e183a1d495cd65412abe0f9df19b151716bfe7
tree9a1565b8bea3c398d39a9f8783e1e5a161f3f6ed
parent97dc4ed3fa377ec91bb60ba98b70d645c2099384
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>
drivers/mfd/max77686.c