Don't drop ce->guc_active.lock when unwinding a context after reset. At one point we had to drop this because of a lock inversion but that is no longer the case. It is much safer to hold the lock so let's do that.
Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface") Reviewed-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Signed-off-by: Matthew Brost matthew.brost@intel.com Cc: stable@vger.kernel.org --- drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 4 ---- 1 file changed, 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index 8b1a82cfb52d..d94e7e1a876f 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -811,8 +811,6 @@ __unwind_incomplete_requests(struct intel_context *ce) continue;
list_del_init(&rq->sched.link); - spin_unlock(&ce->guc_active.lock); - __i915_request_unsubmit(rq);
/* Push the request back into the queue for later resubmission. */ @@ -825,8 +823,6 @@ __unwind_incomplete_requests(struct intel_context *ce)
list_add(&rq->sched.link, pl); set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); - - spin_lock(&ce->guc_active.lock); } spin_unlock(&ce->guc_active.lock); spin_unlock_irqrestore(&sched_engine->lock, flags);