tag 3d41ecb83842d4b332d099d3c8921466ad1932fb
tagger Sasha Levin <alexander.levin@microsoft.com> Fri Sep 14 14:39:33 2018 -0400
object e4c98cce78e482450a6e2e1c8deaca6298c357e7

for-greg-3.18-14092018

commit e4c98cce78e482450a6e2e1c8deaca6298c357e7
author Paul Burton <paul.burton@imgtec.com> Fri Nov 25 18:46:09 2016 +0000
committer Sasha Levin <alexander.levin@microsoft.com> Fri Sep 14 13:55:22 2018 -0400
tree 93de0236926fc1a54465dcc67c65f75b4c115a43
parent d49ed131483200ff9c1e49a0f05e39678ba63611

MIPS: WARN_ON invalid DMA cache maintenance, not BUG_ON

[ Upstream commit d4da0e97baea8768b3d66ccef3967bebd50dfc3b ]

If a driver causes DMA cache maintenance with a zero length then we
currently BUG and kill the kernel. As this is a scenario that we may
well be able to recover from, WARN & return in the condition instead.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/14623/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>