From 977c6e039de4500ea58b6ae9b348f120d5281e39 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sun, 12 Feb 2017 17:20:02 +0000 Subject: [PATCH] drm/i915: Clear the last_retired_context following a hang/reset Following a hang and reset, we know that the engine is idle and all context state has been saved or lost. Consequently, we know that the engine is no longer referencing the last context and we can relinquish our tracking. Signed-off-by: Chris Wilson Cc: Mika Kuoppala Cc: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/20170212172002.23072-5-chris@chris-wilson.co.uk Reviewed-by: Mika Kuoppala --- drivers/gpu/drm/i915/i915_gem.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 730804ce96106..638b335e72b6e 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2788,8 +2788,14 @@ void i915_gem_reset(struct drm_i915_private *dev_priv) i915_gem_retire_requests(dev_priv); - for_each_engine(engine, dev_priv, id) + for_each_engine(engine, dev_priv, id) { + struct i915_gem_context *ctx; + i915_gem_reset_engine(engine); + ctx = fetch_and_zero(&engine->last_retired_context); + if (ctx) + engine->context_unpin(engine, ctx); + } i915_gem_restore_fences(dev_priv); -- 2.39.5