tree 93b3ca97a6e5ad00c4313d016247b5954f75b6a7
parent bbf98d9aa845cff352692f80cca73f2680a2d54c
author Krzysztof Kozlowski <k.kozlowski@samsung.com> 1392113014 +0100
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074795 +0200

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>