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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-06-27 21:13:04 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-06-28 20:56:35 +0100 |
| commit | e3be4079ea91c8b7bcb97cf44889ec5663c55fb4 (patch) | |
| tree | 2d3a704eda86bec44d06f9f7ee0179e4dc5740d4 /drivers/gpu | |
| parent | 78796877c37cb2c3898c4bcd2a12238d83858287 (diff) | |
| download | linux-stable-e3be4079ea91c8b7bcb97cf44889ec5663c55fb4.tar.gz linux-stable-e3be4079ea91c8b7bcb97cf44889ec5663c55fb4.tar.bz2 linux-stable-e3be4079ea91c8b7bcb97cf44889ec5663c55fb4.zip | |
drm/i915: Only signal from interrupt when requested
Avoid calling dma_fence_signal() from inside the interrupt if we haven't
enabled signaling on the request.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180627201304.15817-4-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 5 |
3 files changed, 9 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index c81b4c1877cc..4be56aec99b3 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1182,7 +1182,8 @@ static void notify_ring(struct intel_engine_cs *engine) if (i915_seqno_passed(seqno, wait->seqno)) { struct i915_request *waiter = wait->request; - if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, + if (waiter && + !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &waiter->fence.flags) && intel_wait_check_request(wait, waiter)) rq = i915_request_get(waiter); @@ -1205,8 +1206,11 @@ static void notify_ring(struct intel_engine_cs *engine) spin_unlock(&engine->breadcrumbs.irq_lock); if (rq) { - dma_fence_signal(&rq->fence); + spin_lock(&rq->lock); + dma_fence_signal_locked(&rq->fence); GEM_BUG_ON(!i915_request_completed(rq)); + spin_unlock(&rq->lock); + i915_request_put(rq); } diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index 39b296878ba2..a2f7e9358450 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -1285,7 +1285,7 @@ long i915_request_wait(struct i915_request *rq, if (flags & I915_WAIT_LOCKED) add_wait_queue(errq, &reset); - intel_wait_init(&wait, rq); + intel_wait_init(&wait); restart: do { diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 44ac90ec540c..78f01a35823a 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -928,11 +928,10 @@ static inline u32 intel_hws_preempt_done_address(struct intel_engine_cs *engine) /* intel_breadcrumbs.c -- user interrupt bottom-half for waiters */ int intel_engine_init_breadcrumbs(struct intel_engine_cs *engine); -static inline void intel_wait_init(struct intel_wait *wait, - struct i915_request *rq) +static inline void intel_wait_init(struct intel_wait *wait) { wait->tsk = current; - wait->request = rq; + wait->request = NULL; } static inline void intel_wait_init_for_seqno(struct intel_wait *wait, u32 seqno) |