tree ff753de5fbb156b1990dc83782a195d8ec5cc081
parent 5539b3c938d64a60cb1fc442ac3ce9263d52de0c
author Johan Hovold <johan@kernel.org> 1421079145 +0100
committer Linus Walleij <linus.walleij@linaro.org> 1421241869 +0100

gpio: fix gpio-chip list corruption

Fix potential corruption of gpio-chip list due to failure to remove the
chip from the list before returning in gpiochip_add error path.

The chip could be long gone when the global list is next traversed,
something which could lead to a null-pointer dereference. In the best
case (chip not deallocated) we are just leaking the gpio range.

Fixes: 14e85c0e69d5 ("gpio: remove gpio_descs global array")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>