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From: Matthew Brost <matthew.brost@intel.com>
To: <intel-gfx@lists.freedesktop.org>, drmdevel@freedesktop.org
Cc: <daniel.vetter@ffwll.ch>
Subject: [Intel-gfx] [PATCH 04/21] drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context
Date: Sun, 15 Aug 2021 13:15:42 -0700	[thread overview]
Message-ID: <20210815201559.1150-5-matthew.brost@intel.com> (raw)
In-Reply-To: <20210815201559.1150-1-matthew.brost@intel.com>

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")
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 bc51caba50d0..3cd2da6f5c03 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -806,8 +806,6 @@ __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. */
@@ -820,8 +818,6 @@ __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);
-- 
2.32.0


  parent reply	other threads:[~2021-08-15 20:21 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-15 20:15 [Intel-gfx] [PATCH 00/21] Clean up GuC CI failures, simplify locking, and kernel DOC Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 01/21] drm/i915/guc: Fix blocked context accounting Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 02/21] drm/i915/guc: outstanding G2H accounting Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 03/21] drm/i915/guc: Unwind context requests in reverse order Matthew Brost
2021-08-15 20:15 ` Matthew Brost [this message]
2021-08-15 20:15 ` [Intel-gfx] [PATCH 05/21] drm/i915/guc: Workaround reset G2H is received after schedule done G2H Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 06/21] drm/i915/selftests: Add a cancel request selftest that triggers a reset Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 07/21] drm/i915/guc: Don't enable scheduling on a banned context, guc_id invalid, not registered Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 08/21] drm/i915/selftests: Fix memory corruption in live_lrc_isolation Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 09/21] drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 10/21] drm/i915/guc: Take context ref when cancelling request Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 11/21] drm/i915/guc: Don't touch guc_state.sched_state without a lock Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 12/21] drm/i915/guc: Reset LRC descriptor if register returns -ENODEV Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 13/21] drm/i915: Allocate error capture in atomic context Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 14/21] drm/i915/guc: Flush G2H work queue during reset Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 15/21] drm/i915/guc: Release submit fence from an IRQ Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 16/21] drm/i915/guc: Move guc_blocked fence to struct guc_state Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 17/21] drm/i915/guc: Rework and simplify locking Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 18/21] drm/i915/guc: Proper xarray usage for contexts_lookup Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 19/21] drm/i915/guc: Drop pin count check trick between sched_disable and re-pin Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 20/21] drm/i915/guc: Move GuC priority fields in context under guc_active Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 21/21] drm/i915/guc: Add GuC kernel doc Matthew Brost
2021-08-15 20:33 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Clean up GuC CI failures, simplify locking, and kernel DOC Patchwork
2021-08-15 20:35 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-08-15 21:15 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
2021-08-15 21:54   ` Matthew Brost

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