i2c: mux: demux-pinctrl: check the return value of devm_kstrdup()

devm_kstrdup() returns pointer to allocated string on success,
NULL on failure. So it is better to check the return value of it.

Fixes: e35478eac0 ("i2c: mux: demux-pinctrl: run properly with multiple instances")
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Xiaoke Wang 2022-03-03 20:39:14 +08:00 • committed by Wolfram Sang
commit 7c0195fa9a