From 8490ae207f1d1dd6765e89dd7c189c2c975ee3bc Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 30 Mar 2017 15:50:37 +0100 Subject: [PATCH] drm/i915: Suppress busy status for engines if wedged 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 Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/20170330145041.9005-2-chris@chris-wilson.co.uk --- 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; -- 2.20.1