drm/i915: Hold a reference on the request for its fence chain

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Currently, we have an active reference for the request until it is
retired. Though it cannot be retired before it has been executed by
hardware, the request may be completed before we have finished
processing the execute fence, i.e. we may continue to process that fence
as we free the request.

Fixes: 5590af3e11 ("drm/i915: Drive request submission through fence callbacks")
Fixes: 23902e49c9 ("drm/i915: Split request submit/execute phase into two")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161125131718.20978-3-chris@chris-wilson.co.uk
(cherry picked from commit 48bc2a4a42)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

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Chris Wilson 2016-11-25 13:17:17 +00:00 • committed by Jani Nikula

parent b9f16ff273

commit 0e932c080c

2 changed files with 32 additions and 7 deletions

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34

drivers/gpu/drm/i915/i915_gem_request.c

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5

drivers/gpu/drm/i915/i915_sw_fence.h

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