drm/xe: Change xe_guc_submit_stop return to void

The function xe_guc_submit_stop consistently returns 0 without an error
state, prompting the caller to verify it, which is redundant.

Cc: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240424041911.2184868-1-himal.prasad.ghimiray@intel.com

drivers/gpu/drm/xe/xe_gt.c

@@ -658,9 +658,7 @@ static int gt_reset(struct xe_gt *gt)
 	xe_uc_stop_prepare(&gt->uc);
 	xe_gt_pagefault_reset(gt);
 
-	err = xe_uc_stop(&gt->uc);
-	if (err)
-		goto err_out;
+	xe_uc_stop(&gt->uc);
 
 	xe_gt_tlb_invalidation_reset(gt);
 

drivers/gpu/drm/xe/xe_guc.c

@@ -885,17 +885,11 @@ void xe_guc_stop_prepare(struct xe_guc *guc)
 	XE_WARN_ON(xe_guc_pc_stop(&guc->pc));
 }
 
-int xe_guc_stop(struct xe_guc *guc)
+void xe_guc_stop(struct xe_guc *guc)
 {
-	int ret;
-
 	xe_guc_ct_stop(&guc->ct);
 
-	ret = xe_guc_submit_stop(guc);
-	if (ret)
-		return ret;
-
-	return 0;
+	xe_guc_submit_stop(guc);
 }
 
 int xe_guc_start(struct xe_guc *guc)

drivers/gpu/drm/xe/xe_guc.h

@@ -35,7 +35,7 @@ void xe_guc_print_info(struct xe_guc *guc, struct drm_printer *p);
 int xe_guc_reset_prepare(struct xe_guc *guc);
 void xe_guc_reset_wait(struct xe_guc *guc);
 void xe_guc_stop_prepare(struct xe_guc *guc);
-int xe_guc_stop(struct xe_guc *guc);
+void xe_guc_stop(struct xe_guc *guc);
 int xe_guc_start(struct xe_guc *guc);
 bool xe_guc_in_reset(struct xe_guc *guc);
 

drivers/gpu/drm/xe/xe_guc_submit.c

@@ -1519,7 +1519,7 @@ void xe_guc_submit_reset_wait(struct xe_guc *guc)
 	wait_event(guc->ct.wq, !guc_read_stopped(guc));
 }
 
-int xe_guc_submit_stop(struct xe_guc *guc)
+void xe_guc_submit_stop(struct xe_guc *guc)
 {
 	struct xe_exec_queue *q;
 	unsigned long index;
@@ -1539,7 +1539,6 @@ int xe_guc_submit_stop(struct xe_guc *guc)
 	 * creation which is protected by guc->submission_state.lock.
 	 */
 
-	return 0;
 }
 
 static void guc_exec_queue_start(struct xe_exec_queue *q)

drivers/gpu/drm/xe/xe_guc_submit.h

@@ -16,7 +16,7 @@ int xe_guc_submit_init(struct xe_guc *guc);
 
 int xe_guc_submit_reset_prepare(struct xe_guc *guc);
 void xe_guc_submit_reset_wait(struct xe_guc *guc);
-int xe_guc_submit_stop(struct xe_guc *guc);
+void xe_guc_submit_stop(struct xe_guc *guc);
 int xe_guc_submit_start(struct xe_guc *guc);
 
 int xe_guc_sched_done_handler(struct xe_guc *guc, u32 *msg, u32 len);

drivers/gpu/drm/xe/xe_uc.c

@@ -215,13 +215,13 @@ void xe_uc_stop_prepare(struct xe_uc *uc)
 	xe_guc_stop_prepare(&uc->guc);
 }
 
-int xe_uc_stop(struct xe_uc *uc)
+void xe_uc_stop(struct xe_uc *uc)
 {
 	/* GuC submission not enabled, nothing to do */
 	if (!xe_device_uc_enabled(uc_to_xe(uc)))
-		return 0;
+		return;
 
-	return xe_guc_stop(&uc->guc);
+	xe_guc_stop(&uc->guc);
 }
 
 int xe_uc_start(struct xe_uc *uc)
@@ -247,17 +247,13 @@ static void uc_reset_wait(struct xe_uc *uc)
 
 int xe_uc_suspend(struct xe_uc *uc)
 {
-	int ret;
-
 	/* GuC submission not enabled, nothing to do */
 	if (!xe_device_uc_enabled(uc_to_xe(uc)))
 		return 0;
 
 	uc_reset_wait(uc);
 
-	ret = xe_uc_stop(uc);
-	if (ret)
-		return ret;
+	xe_uc_stop(uc);
 
 	return xe_guc_suspend(&uc->guc);
 }

drivers/gpu/drm/xe/xe_uc.h

@@ -16,7 +16,7 @@ int xe_uc_fini_hw(struct xe_uc *uc);
 void xe_uc_gucrc_disable(struct xe_uc *uc);
 int xe_uc_reset_prepare(struct xe_uc *uc);
 void xe_uc_stop_prepare(struct xe_uc *uc);
-int xe_uc_stop(struct xe_uc *uc);
+void xe_uc_stop(struct xe_uc *uc);
 int xe_uc_start(struct xe_uc *uc);
 int xe_uc_suspend(struct xe_uc *uc);
 int xe_uc_sanitize_reset(struct xe_uc *uc);