drm/i915: Move the irq_barrier for reset earlier into reset_prepare
authorChris Wilson <chris@chris-wilson.co.uk>
Fri, 10 Feb 2017 18:52:14 +0000 (18:52 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Fri, 10 Feb 2017 21:10:51 +0000 (21:10 +0000)
commit8c12d121590ebe5a43bf9a0aedbbeb192f257846
treefb0cbe3f1085206f9aeec75c6a44c5e1337fed2b
parentc4d4c1c66be58e1e91a2eeada02c0cbdeb5fb350
drm/i915: Move the irq_barrier for reset earlier into reset_prepare

When updating the bookkeeping following the reset, we need the seqno to
be coherent on the CPU prior to trusting its result for deciding whether
any request is completed. We need the irq_barrier before we start making
these decisions, i.e. in reset_prepare.

References: https://bugs.freedesktop.org/show_bug.cgi?id=99733
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170210185214.23463-1-chris@chris-wilson.co.uk
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
drivers/gpu/drm/i915/i915_gem.c