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drm/i915: Use a global lock for modifying global irq flags

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We were attempting to use a per-ring spinlock whilst modifying global
IRQ flags. A recipe for rare missed interrupts.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson
2012-04-24 21:48:47 +01:00
committed by Daniel Vetter
parent 97e1930f09
commit 7338aefa5c
2 changed files with 25 additions and 19 deletions
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3
drivers/gpu/drm/i915/intel_ringbuffer.h
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@@ -56,8 +56,7 @@ struct intel_ring_buffer {
*/
u32 last_retired_head;
spinlock_t irq_lock;
u32 irq_refcount;
u32 irq_refcount; /* protected by dev_priv->irq_lock */
u32 irq_enable_mask; /* bitmask to enable ring interrupt */
u32 irq_seqno; /* last seq seem at irq time */
u32 trace_irq_seqno;