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drm/i915: Mark GEM wedged right after marking device unplugged

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As soon as a device is considered unplugged, not only prevent pending
users from accessing the device structures but also cancel all their
pending requests so all consumed resources can be cleaned up as soon
as possible.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190406104034.31380-1-chris@chris-wilson.co.uk
This commit is contained in:
Janusz Krzysztofik 2019-04-06 11:40:34 +01:00 committed by Chris Wilson
parent 95007efbe6
commit 141f3767e7
2 changed files with 8 additions and 0 deletions
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7
drivers/gpu/drm/i915/i915_drv.c
View File

@ -1907,6 +1907,13 @@ void i915_driver_unload(struct drm_device *dev)
i915_driver_unregister(dev_priv);
/*
* After unregistering the device to prevent any new users, cancel
* all in-flight requests so that we can quickly unbind the active
* resources.
*/
i915_gem_set_wedged(dev_priv);
/* Flush any external code that still may be under the RCU lock */
synchronize_rcu();

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -2917,6 +2917,7 @@ static inline void i915_gem_drain_workqueue(struct drm_i915_private *i915)
int pass = 2;
do {
rcu_barrier();
i915_gem_drain_freed_objects(i915);
drain_workqueue(i915->wq);
} while (--pass);
}