tree 89fab4c828734cb404957169f6b40c1d1d582653
parent 3a10e3dd52e80b9a97a3346020024d17b2c272d6
author Kangjie Lu <kjlu@umn.edu> 1552670166 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1553006263 +0100

tty: atmel_serial: fix a potential NULL pointer dereference

In case dmaengine_prep_dma_cyclic fails, the fix returns a proper
error code to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Fixes: 34df42f59a60 ("serial: at91: add rx dma support")
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>