tree 8a84d17142a6adf1e9380c128cd581a27754ee3b
parent 54f555cf1e677cd514a531e463fc853045065991
author Joseph Lo <josephl@nvidia.com> 1446017662 +0800
committer ChromeOS bot <3su6n15k.default@developer.gserviceaccount.com> 1446077858 +0000

t210: lp0_resume: clear the MC_INTSTATUS if MC_INTMASK was 0

The MC/SMMU should be resumed by the kernel. And the unexpected value
in the MC_INTSTATUS should be cleared before that. Or it will cause
some noisy MC interrupt once we enable the IRQ in the kernel.

BUG=chrome-os-partner:46796
BRANCH=none
TEST=LP0 suspend/resume test and the EMEM decode/arbitration errors
     should not be observed on resume.

Change-Id: I4d34905c04effd54d0d0edf8809e192283db2ca3
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Reviewed-on: https://chromium-review.googlesource.com/309248
Reviewed-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Commit-Queue: Joseph Lo <yushun.lo@gmail.com>
Tested-by: Joseph Lo <yushun.lo@gmail.com>