[PATCH 01/12] drm/i915: Remove bogus GEM_BUG_ON in unpark

[John.C.Harrison at Intel.com]

From: Matthew Brost <matthew.brost at intel.com>

Remove bogus GEM_BUG_ON which compared kernel context timeline seqno to
seqno in memory on engine PM unpark. If a GT reset occurred these values
might not match as a kernel context could be skipped. This bug was
hidden by always switching to a kernel context on park (execlists
requirement).

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_engine_pm.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index b0a4a2dbe3ee9..fb3e1599d04ec 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -68,8 +68,6 @@ static int __engine_unpark(struct intel_wakeref *wf)
 			 ce->timeline->seqno,
 			 READ_ONCE(*ce->timeline->hwsp_seqno),
 			 ce->ring->emit);
-		GEM_BUG_ON(ce->timeline->seqno !=
-			   READ_ONCE(*ce->timeline->hwsp_seqno));
 	}
 
 	if (engine->unpark)
-- 
2.36.0