[Intel-gfx] [PATCH 2/2] drm/i915: Context objects can never be active when freed

[Chris Wilson]

Due to how we only release the pining on the context state on
retirement and never track activity on the context vma itself, the
object can never be active at the point of release. Replace the
conditional transfer of ownership onto an active-reference with an
assert that the object is idle.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/gpu/drm/i915/intel_lrc.c        | 4 +++-
 drivers/gpu/drm/i915/intel_ringbuffer.c | 7 +++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 97460ee25b7d..2b21a6596360 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1343,7 +1343,9 @@ static void execlists_context_destroy(struct intel_context *ce)
 		return;
 
 	intel_ring_free(ce->ring);
-	__i915_gem_object_release_unless_active(ce->state->obj);
+
+	GEM_BUG_ON(i915_gem_object_is_active(ce->state->obj));
+	i915_gem_object_put(ce->state->obj);
 }
 
 static void execlists_context_unpin(struct intel_context *ce)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index e0448eff12bd..700f94c371b3 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1169,8 +1169,11 @@ static void intel_ring_context_destroy(struct intel_context *ce)
 {
 	GEM_BUG_ON(ce->pin_count);
 
-	if (ce->state)
-		__i915_gem_object_release_unless_active(ce->state->obj);
+	if (!ce->state)
+		return;
+
+	GEM_BUG_ON(i915_gem_object_is_active(ce->state->obj));
+	i915_gem_object_put(ce->state->obj);
 }
 
 static int __context_pin_ppgtt(struct i915_gem_context *ctx)
-- 
2.18.0