Avoid calling dma_fence_signal() from inside the interrupt if we haven't
enabled signaling on the request.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuopp...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 8 ++++++--
drivers/gpu/drm/i915/i915_request.c | 2 +-
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 6adeaac48ea9..1eba2c3895fc 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1173,7 +1173,8 @@ 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);
@@ -1196,8 +1197,11 @@ 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)
--
2.18.0
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