drm/i915/breadcrumbs: Assert that we do not shortcut the current bottom-half

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We need to ensure that we always serialize updates to the bottom-half
using the breadcrumbs.irq_lock so that we don't race with a concurrent
interrupt handler. This is most important just prior to leaving the
waiter (when the intel_wait will be overwritten), so make sure we are
not the current bottom-half when skipping the irq locks.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170315210726.12095-4-chris@chris-wilson.co.uk

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Chris Wilson 2017-03-15 21:07:25 +00:00

parent a5cae7b8ed

commit 908a6cbf84

1 changed files with 4 additions and 1 deletions

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drivers/gpu/drm/i915/intel_breadcrumbs.c

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