diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-06-27 21:13:03 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-06-28 20:56:35 +0100 |
| commit | 78796877c37cb2c3898c4bcd2a12238d83858287 (patch) | |
| tree | dfb89c14a8a2e1b7cd190a3ff113acf7ed07d434 /drivers/gpu/drm/i915/i915_request.c | |
| parent | 69dc4d003e3b7c262fd5fea3f25852e853eb6d4f (diff) | |
drm/i915: Move the irq_counter inside the spinlock
Rather than have multiple locked instructions inside the notify_ring()
irq handler, move them inside the spinlock and reduce their intrinsic
locking.
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/20180627201304.15817-3-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_request.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index e1dbb544046f..39b296878ba2 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -1196,7 +1196,7 @@ static bool __i915_spin_request(const struct i915_request *rq, * takes to sleep on a request, on the order of a microsecond. */ - irq = atomic_read(&engine->irq_count); + irq = READ_ONCE(engine->breadcrumbs.irq_count); timeout_us += local_clock_us(&cpu); do { if (i915_seqno_passed(intel_engine_get_seqno(engine), seqno)) @@ -1208,7 +1208,7 @@ static bool __i915_spin_request(const struct i915_request *rq, * assume we won't see one in the near future but require * the engine->seqno_barrier() to fixup coherency. */ - if (atomic_read(&engine->irq_count) != irq) + if (READ_ONCE(engine->breadcrumbs.irq_count) != irq) break; if (signal_pending_state(state, current)) |