From: Matthew Brost Date: Thu, 9 Sep 2021 16:47:25 +0000 (-0700) Subject: drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context X-Git-Tag: baikal/mips/sdk6.1~7173^2~8^2~93 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=aca703f44585e65abd58d1fd1038a0148846d7e0;p=kernel.git drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context 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: 81ab2f1fdb42 ("drm/i915/guc: Reset implementation for new GuC interface") Reviewed-by: Daniele Ceraolo Spurio Signed-off-by: Matthew Brost Cc: Signed-off-by: John Harrison Link: https://patchwork.freedesktop.org/patch/msgid/20210909164744.31249-5-matthew.brost@intel.com --- 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 0c1e6b465fba9..31bbfe5479aeb 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -813,8 +813,6 @@ __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. */ @@ -827,8 +825,6 @@ __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);