Daniel Vetter f326038a29
drm/i915: Clarify event_lock locking, irq&mixed context ...
Now we tackle the functions also called from interrupt handlers.
- intel_check_page_flip is exclusively called from irq handlers, so a
plain spin_lock is all we need. In i915_irq.c we have the convention
to give all such functions an _irq_handler postfix, but that would
look strange and als be a bit a misleading name. I've opted for a
WARN_ON(!in_irq()) instead.
- The other two places left are called both from interrupt handlers
and from our reset work, so need the full irqsave dance. Annotate
them with a short comment.
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org >
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch >
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