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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-12-13 17:54:50 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-12-14 12:34:46 +0100 |
| commit | b13c2b96bf15b9dd0f1a45fd788f3a3025c5aec6 (patch) | |
| tree | 6eb68ba8f5e4ec977efc3e087435ef272534915c /drivers/gpu/drm/i915/intel_ringbuffer.h | |
| parent | Merge branch 'drm-intel-fixes' into drm-intel-next (diff) | |
| download | linux-b13c2b96bf15b9dd0f1a45fd788f3a3025c5aec6.tar.xz linux-b13c2b96bf15b9dd0f1a45fd788f3a3025c5aec6.zip | |
drm/i915/ringbuffer: Make IRQ refcnting atomic
In order to enforce the correct memory barriers for irq get/put, we need
to perform the actual counting using atomic operations.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 9652e4600b5e..8e2e357ad6ee 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -54,8 +54,8 @@ struct intel_ring_buffer { u32 irq_seqno; /* last seq seem at irq time */ u32 waiting_seqno; u32 sync_seqno[I915_NUM_RINGS-1]; - u32 irq_refcount; - void (*irq_get)(struct intel_ring_buffer *ring); + atomic_t irq_refcount; + bool __must_check (*irq_get)(struct intel_ring_buffer *ring); void (*irq_put)(struct intel_ring_buffer *ring); int (*init)(struct intel_ring_buffer *ring); |