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drm/i915: Mark intel_wakeref_get() as a sleeper

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Assume that intel_wakeref_get() may take the mutex, and perform other
sleeping actions in the course of its callbacks and so use might_sleep()
to ensure that all callers abide. Anything that cannot sleep has to use
e.g. intel_wakeref_get_if_active() to guarantee its avoidance of the
non-atomic paths.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191121130528.309474-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2019-11-21 13:05:28 +00:00
parent c95d31c3df
commit 93b0e8fe47
4 changed files with 24 additions and 4 deletions
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2
drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
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@@ -529,7 +529,7 @@ static struct i915_request *schedule_in(struct i915_request *rq, int idx)
* required if we generalise the inflight tracking.
*/
intel_gt_pm_get(rq->engine->gt);
__intel_gt_pm_get(rq->engine->gt);
return i915_request_get(rq);
}