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| author | Ben Widawsky <ben@bwidawsk.net> | 2012-04-26 16:03:02 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-05-03 11:18:22 +0200 |
| commit | c58cf4f1082d81c42be89e9c6eeca6466954a70c (patch) | |
| tree | 2a99947e184e4833bb8854747fd1ebe1038e616b /drivers/gpu | |
| parent | 9574b3fe29ba9064c03e8db0e399f5fe356ee03b (diff) | |
| download | talos-op-linux-c58cf4f1082d81c42be89e9c6eeca6466954a70c.tar.gz talos-op-linux-c58cf4f1082d81c42be89e9c6eeca6466954a70c.zip | |
drm/i915: drop polled waits from i915_wait_request
The only time irq_get should fail is during unload or suspend. Both of
these points should try to quiesce the GPU before disabling interrupts
and so the atomic polling should never occur.
This was recommended by Chris Wilson as a way of reducing added
complexity to the polled wait which I introduced in an RFC patch.
09:57 < ickle_> it's only there as a fudge for waiting after irqs
after uninstalled during s&r, we aren't actually meant to hit it
09:57 < ickle_> so maybe we should just kill the code there and fix the breakage
v2: return -ENODEV instead of -EBUSY when irq_get fails
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 292b4a9e7bab..148e04baceba 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1864,22 +1864,19 @@ i915_wait_request(struct intel_ring_buffer *ring, if (!i915_seqno_passed(ring->get_seqno(ring), seqno)) { trace_i915_gem_request_wait_begin(ring, seqno); - if (ring->irq_get(ring)) { - if (dev_priv->mm.interruptible) - ret = wait_event_interruptible(ring->irq_queue, - i915_seqno_passed(ring->get_seqno(ring), seqno) - || atomic_read(&dev_priv->mm.wedged)); - else - wait_event(ring->irq_queue, - i915_seqno_passed(ring->get_seqno(ring), seqno) - || atomic_read(&dev_priv->mm.wedged)); + if (WARN_ON(!ring->irq_get(ring))) + return -ENODEV; - ring->irq_put(ring); - } else if (wait_for_atomic(i915_seqno_passed(ring->get_seqno(ring), - seqno) || - atomic_read(&dev_priv->mm.wedged), 3000)) - ret = -EBUSY; + if (dev_priv->mm.interruptible) + ret = wait_event_interruptible(ring->irq_queue, + i915_seqno_passed(ring->get_seqno(ring), seqno) + || atomic_read(&dev_priv->mm.wedged)); + else + wait_event(ring->irq_queue, + i915_seqno_passed(ring->get_seqno(ring), seqno) + || atomic_read(&dev_priv->mm.wedged)); + ring->irq_put(ring); trace_i915_gem_request_wait_end(ring, seqno); } if (atomic_read(&dev_priv->mm.wedged)) |
