tree 7985f8c6aaaec5f6a1a603b0af59036072e340be
parent a2c40c41e64d47028df080fc78f912064066d6d7
author Adam Ford <aford173@gmail.com> 1570379591 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1573039088 +0100

serial: mctrl_gpio: Check for NULL pointer

[ Upstream commit 37e3ab00e4734acc15d96b2926aab55c894f4d9c ]

When using mctrl_gpio_to_gpiod, it dereferences gpios into a single
requested GPIO.  This dereferencing can break if gpios is NULL,
so this patch adds a NULL check before dereferencing it.  If
gpios is NULL, this function will also return NULL.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Link: https://lore.kernel.org/r/20191006163314.23191-1-aford173@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>