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drm/i915/userptr: Only flush the workqueue if required

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To avoid waiting for work from other invalidate-range threads where
not required, only wait on the userptr cancel workqueue if we have added
some work to it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170307205851.32578-2-chris@chris-wilson.co.uk
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
This commit is contained in:
Chris Wilson 2017-03-07 20:58:50 +00:00
parent 42953b3c51
commit d151e9ce98
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_gem_userptr.c
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@ -145,7 +145,8 @@ static void i915_gem_userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
del_object(mo);
spin_unlock(&mn->lock);
flush_workqueue(mn->wq);
if (!list_empty(&cancelled))
flush_workqueue(mn->wq);
}
static const struct mmu_notifier_ops i915_gem_userptr_notifier = {