If the driver is wedged, HW state may be very inconsistent and
report that it is still busy, even though we have stopped using it. This
can lead to a double *ERROR* rather than a graceful cleanup after
wedging.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_gem.c | 4 +---
drivers/gpu/drm/i915/intel_engine_cs.c | 9 +++++++++
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index cb61cec26db5..7165f314f830 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3112,9 +3112,7 @@ i915_gem_idle_work_handler(struct work_struct *work)
* Wait for last execlists context complete, but bail out in case a
* new request is submitted.
*/
- wait_for(READ_ONCE(dev_priv->gt.active_requests) ||
- intel_engines_are_idle(dev_priv),
- 10);
+ wait_for(intel_engines_are_idle(dev_priv), 10);
if (READ_ONCE(dev_priv->gt.active_requests))
return;
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c
b/drivers/gpu/drm/i915/intel_engine_cs.c
index 1fb97e8401de..854e8e0c836b 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1111,6 +1111,15 @@ bool intel_engines_are_idle(struct drm_i915_private
*dev_priv)
struct intel_engine_cs *engine;
enum intel_engine_id id;
+ if (READ_ONCE(dev_priv->gt.active_requests))
+ return false;
+
+ /* If the driver is wedged, HW state may be very inconsistent and
+ * report that it is still busy, even though we have stopped using it.
+ */
+ if (i915_terminally_wedged(&dev_priv->gpu_error))
+ return true;
+
for_each_engine(engine, dev_priv, id) {
if (!intel_engine_is_idle(engine))
return false;
--
2.11.0
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