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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-27 11:57:04 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-02-28 12:24:29 +0300 |
| commit | c0e310188299358279fc27c88512f94db78991a6 (patch) | |
| tree | 60f6d79d32c09250b9d742c3d96cc2ead9e610d6 /drivers | |
| parent | 69edc390a54268d41e45089cb972bf71510f5f07 (diff) | |
| download | linux-c0e310188299358279fc27c88512f94db78991a6.tar.xz | |
drm/i915: Skip barriers inside waits
Attaching to the i915_active barrier is a two stage process, and a flush
is only effective when the barrier is activation. Thus it is possible
for us to see a barrier, and attempt to flush, only for our flush to
have no effect. As such, before attempting to activate signaling on the
fence we need to double check it is a fence!
Fixes: d13a31770077 ("drm/i915: Flush idle barriers when waiting")
Closes: https://gitlab.freedesktop.org/drm/intel/issues/1333
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200227085723.1961649-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_active.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c index 0b12d5023800..7b3d6c12ad61 100644 --- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -453,6 +453,9 @@ static void enable_signaling(struct i915_active_fence *active) { struct dma_fence *fence; + if (unlikely(is_barrier(active))) + return; + fence = i915_active_fence_get(active); if (!fence) return; |