Merge tag 'drm-intel-fixes-2018-03-07' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- 2 fixes: 1 for perf and 1 execlist submission race.

* tag 'drm-intel-fixes-2018-03-07' of git://anongit.freedesktop.org/drm/drm-intel:
  drm/i915: Suspend submission tasklets around wedging
  drm/i915/perf: fix perf stream opening lock