diff mbox series

[3/4] drm/i915/guc: Flush G2H work queue during reset

Message ID 20210914042445.29466-4-matthew.brost@intel.com (mailing list archive)
State New, archived
Headers show
Series Do error capture async, flush G2H processing on reset | expand

Commit Message

Matthew Brost Sept. 14, 2021, 4:24 a.m. UTC 
It isn't safe to scrub for missing G2H or continue with the reset until
all G2H processing is complete. Flush the G2H work queue during reset to
ensure it is done running. No need to call the IRQ handler directly
either as the scrubbing code can deal with any missing G2H.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c  | 18 +-----------------
 1 file changed, 1 insertion(+), 17 deletions(-)
diff mbox series

Patch

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 ba6838a35a69..1986a57b52cc 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -800,8 +800,6 @@  static void guc_flush_submissions(struct intel_guc *guc)
 
 void intel_guc_submission_reset_prepare(struct intel_guc *guc)
 {
-	int i;
-
 	if (unlikely(!guc_submission_initialized(guc))) {
 		/* Reset called during driver load? GuC not yet initialised! */
 		return;
@@ -816,21 +814,7 @@  void intel_guc_submission_reset_prepare(struct intel_guc *guc)
 	spin_unlock_irq(&guc_to_gt(guc)->irq_lock);
 
 	guc_flush_submissions(guc);
-
-	/*
-	 * Handle any outstanding G2Hs before reset. Call IRQ handler directly
-	 * each pass as interrupt have been disabled. We always scrub for
-	 * outstanding G2H as it is possible for outstanding_submission_g2h to
-	 * be incremented after the context state update.
-	 */
-	for (i = 0; i < 4 && atomic_read(&guc->outstanding_submission_g2h); ++i) {
-		intel_guc_to_host_event_handler(guc);
-#define wait_for_reset(guc, wait_var) \
-		intel_guc_wait_for_pending_msg(guc, wait_var, false, (HZ / 20))
-		do {
-			wait_for_reset(guc, &guc->outstanding_submission_g2h);
-		} while (!list_empty(&guc->ct.requests.incoming));
-	}
+	flush_work(&guc->ct.requests.worker);
 
 	scrub_guc_desc_for_outstanding_g2h(guc);
 }