[Intel-gfx] [PATCH] drm/i915/gt: Drop a defunct timeline assertion

[Chris Wilson]

intel_timeline_enter() has been decoupled from intel_timeline_pin() and
both enter/exit & pin/unpin are allowed [read expected] to run
concurrently with one another. The assertion that they had better not is
stale.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/940
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_timeline.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.c b/drivers/gpu/drm/i915/gt/intel_timeline.c
index ee5dc4fbdeb9..87716529cd2f 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline.c
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.c
@@ -348,7 +348,6 @@ void intel_timeline_enter(struct intel_timeline *tl)
 	 * use atomic to manipulate tl->active_count.
 	 */
 	lockdep_assert_held(&tl->mutex);
-	GEM_BUG_ON(!atomic_read(&tl->pin_count));
 
 	if (atomic_add_unless(&tl->active_count, 1, 0))
 		return;
-- 
2.25.0.rc1