diff options
| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2013-12-12 16:54:42 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-12-12 22:58:44 +0100 |
| commit | 168c3f2151a7de906b060a335d19b0ba483a6718 (patch) | |
| tree | a16a98d2681502b96962bdc8a4435dcae67e3a49 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | drm/i915: Rework the FBC interval/stall stuff a bit (diff) | |
| download | linux-168c3f2151a7de906b060a335d19b0ba483a6718.tar.xz linux-168c3f2151a7de906b060a335d19b0ba483a6718.zip | |
drm/i915: dont call irq_put when irq test is on
If test is running, irq_get was not called so we should gain
balance by not doing irq_put
"So the rule is: if you access unlocked values, you use ACCESS_ONCE().
You don't say "but it can't matter". Because you simply don't know."
-- Linus
v2: use local variable so it can't change during test (Chris)
v3: update commit msg and use ACCESS_ONCE (Ville)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 279387a2fef5..e34b48e862e7 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1015,6 +1015,8 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno, struct drm_i915_file_private *file_priv) { drm_i915_private_t *dev_priv = ring->dev->dev_private; + const bool irq_test_in_progress = + ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring); struct timespec before, now; DEFINE_WAIT(wait); unsigned long timeout_expire; @@ -1035,8 +1037,7 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno, msecs_to_jiffies(100)); } - if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring)) && - WARN_ON(!ring->irq_get(ring))) + if (!irq_test_in_progress && WARN_ON(!ring->irq_get(ring))) return -ENODEV; /* Record current time in case interrupted by signal, or wedged */ @@ -1093,7 +1094,8 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno, getrawmonotonic(&now); trace_i915_gem_request_wait_end(ring, seqno); - ring->irq_put(ring); + if (!irq_test_in_progress) + ring->irq_put(ring); finish_wait(&ring->irq_queue, &wait); |