diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_ring.h')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_ring.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_ring.h b/drivers/gpu/drm/i915/gt/intel_ring.h index 5bdce24994aa..cc0ebca65167 100644 --- a/drivers/gpu/drm/i915/gt/intel_ring.h +++ b/drivers/gpu/drm/i915/gt/intel_ring.h @@ -88,6 +88,8 @@ static inline u32 intel_ring_offset(const struct i915_request *rq, void *addr) static inline void assert_ring_tail_valid(const struct intel_ring *ring, unsigned int tail) { + unsigned int head = READ_ONCE(ring->head); + GEM_BUG_ON(!intel_ring_offset_valid(ring, tail)); /* @@ -105,8 +107,7 @@ assert_ring_tail_valid(const struct intel_ring *ring, unsigned int tail) * into the same cacheline as ring->head. */ #define cacheline(a) round_down(a, CACHELINE_BYTES) - GEM_BUG_ON(cacheline(tail) == cacheline(ring->head) && - tail < ring->head); + GEM_BUG_ON(cacheline(tail) == cacheline(head) && tail < head); #undef cacheline } |