From c5baa566db793cbd931f64d265cdc7d744c6169a Mon Sep 17 00:00:00 2001 From: Tomas Elf Date: Fri, 23 Oct 2015 18:02:37 +0100 Subject: [PATCH] drm/i915: Update to post-reset execlist queue clean-up When clearing an execlist queue, instead of traversing it and unreferencing all requests while holding the spinlock (which might lead to thread sleeping with IRQs are turned off - bad news!), just move all requests to the retire request list while holding spinlock and then drop spinlock and invoke the execlists request retirement path, which already deals with the intricacies of purging/dereferencing execlist queue requests. This patch can be considered v3 of: commit b96db8b81c54ef30485ddb5992d63305d86ea8d3 Author: Tomas Elf drm/i915: Grab execlist spinlock to avoid post-reset concurrency issues This patch assumes v2 of the above patch is part of the baseline, reverts v2 and adds changes on top to turn it into v3. Signed-off-by: Tomas Elf Cc: Tvrtko Ursulin Cc: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/1445619757-19822-1-git-send-email-tomas.elf@intel.com Reviewed-by: Thomas Daniel Reviewed-by: Dave Gordon Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 86dbf9ce5baa..26eba87ca35c 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2757,20 +2757,13 @@ static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv, if (i915.enable_execlists) { spin_lock_irq(&ring->execlist_lock); - while (!list_empty(&ring->execlist_queue)) { - struct drm_i915_gem_request *submit_req; - submit_req = list_first_entry(&ring->execlist_queue, - struct drm_i915_gem_request, - execlist_link); - list_del(&submit_req->execlist_link); + /* list_splice_tail_init checks for empty lists */ + list_splice_tail_init(&ring->execlist_queue, + &ring->execlist_retired_req_list); - if (submit_req->ctx != ring->default_context) - intel_lr_context_unpin(submit_req); - - i915_gem_request_unreference(submit_req); - } spin_unlock_irq(&ring->execlist_lock); + intel_execlists_retire_requests(ring); } /* -- 2.39.5