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

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commit ad09dd6a1f upstream.

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.

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>

...

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Krzysztof Kozlowski 2014-02-11 11:03:32 +01:00 • committed by Greg Kroah-Hartman

parent 1139c7aea9

commit 28fcbf3dd3

1 changed files with 11 additions and 1 deletions

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drivers/mfd/max77693.c

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