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drm/i915/execlists: Leave resetting ring to intel_ring 

We need to allow concurrent intel_context_unpin, which means avoiding
doing destructive operations like intel_ring_reset(). This was already
fixed for intel_ring_unpin() in commit 0725d9a318 ("drm/i915/gt: Make
intel_ring_unpin() safe for concurrent pint"), but I overlooked that
execlists_context_unpin() also made the same mistake.

Reported-by: Matthew Brost <matthew.brost@intel.com>
Fixes: 8413502238 ("drm/i915/gt: Drop mutex serialisation between context pin/unpin")
References: 0725d9a318 ("drm/i915/gt: Make intel_ring_unpin() safe for concurrent pint")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200115175829.2761329-1-chris@chris-wilson.co.uk
(cherry picked from commit f3c0efc9fe)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Chris Wilson 2020-01-15 17:58:29 +00:00 committed by Jani Nikula
parent 1b5af53781
commit a754012b9f
1 changed files with 0 additions and 1 deletions
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drivers/gpu/drm/i915/gt/intel_lrc.c
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@ -2532,7 +2532,6 @@ static void execlists_context_unpin(struct intel_context *ce)
ce->engine);
i915_gem_object_unpin_map(ce->state->obj);
intel_ring_reset(ce->ring, ce->ring->tail);
}
static void