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serial: max310x: Fix to avoid potential NULL pointer dereference
authorAditya Pakki <pakki001@umn.edu>
Mon, 18 Mar 2019 23:44:14 +0000 (18:44 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 Apr 2019 04:23:27 +0000 (06:23 +0200)
commit7124c71944ee422c0f56b1f2093bfdb7bd6f5f97
tree1737bff885fd65aa65f751167fe173f9053dc468
parent2e7c2f25e902579fc81636c0f5c9f856f4428d7c
serial: max310x: Fix to avoid potential NULL pointer dereference

commit 3a10e3dd52e80b9a97a3346020024d17b2c272d6 upstream.

of_match_device can return a NULL pointer when matching device is not
found. This patch avoids a scenario causing NULL pointer derefernce.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/max310x.c