drm/xe: Simplify function return using drmm_add_action_or_reset()

Instead of assigning the value of drmm_add_action_or_reset() to err and
returning err in case of failure and 0 in case of success, simply return
the result of drmm_add_action_or_reset().

-v2:
cleanup in xe_display too.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412181211.1155732-2-himal.prasad.ghimiray@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/display/xe_display.c

@@ -101,8 +101,6 @@ static void display_destroy(struct drm_device *dev, void *dummy)
  */
 int xe_display_create(struct xe_device *xe)
 {
-	int err;
-
 	spin_lock_init(&xe->display.fb_tracking.lock);
 
 	xe->display.hotplug.dp_wq = alloc_ordered_workqueue("xe-dp", 0);
@@ -110,11 +108,7 @@ int xe_display_create(struct xe_device *xe)
 	drmm_mutex_init(&xe->drm, &xe->sb_lock);
 	xe->enabled_irq_mask = ~0;
 
-	err = drmm_add_action_or_reset(&xe->drm, display_destroy, NULL);
-	if (err)
-		return err;
-
-	return 0;
+	return drmm_add_action_or_reset(&xe->drm, display_destroy, NULL);
 }
 
 static void xe_display_fini_nommio(struct drm_device *dev, void *dummy)

drivers/gpu/drm/xe/xe_device.c

@@ -649,11 +649,7 @@ int xe_device_probe(struct xe_device *xe)
 
 	xe_hwmon_register(xe);
 
-	err = drmm_add_action_or_reset(&xe->drm, xe_device_sanitize, xe);
-	if (err)
-		return err;
-
-	return 0;
+	return drmm_add_action_or_reset(&xe->drm, xe_device_sanitize, xe);
 
 err_fini_display:
 	xe_display_driver_remove(xe);

drivers/gpu/drm/xe/xe_gsc_proxy.c

@@ -403,7 +403,6 @@ static int proxy_channel_alloc(struct xe_gsc *gsc)
 	struct xe_device *xe = gt_to_xe(gt);
 	struct xe_bo *bo;
 	void *csme;
-	int err;
 
 	csme = kzalloc(GSC_PROXY_CHANNEL_SIZE, GFP_KERNEL);
 	if (!csme)
@@ -424,11 +423,7 @@ static int proxy_channel_alloc(struct xe_gsc *gsc)
 	gsc->proxy.to_csme = csme;
 	gsc->proxy.from_csme = csme + GSC_PROXY_BUFFER_SIZE;
 
-	err = drmm_add_action_or_reset(&xe->drm, proxy_channel_free, gsc);
-	if (err)
-		return err;
-
-	return 0;
+	return drmm_add_action_or_reset(&xe->drm, proxy_channel_free, gsc);
 }
 
 /**

drivers/gpu/drm/xe/xe_gt.c

@@ -558,11 +558,7 @@ int xe_gt_init(struct xe_gt *gt)
 	if (err)
 		return err;
 
-	err = drmm_add_action_or_reset(&gt_to_xe(gt)->drm, gt_fini, gt);
-	if (err)
-		return err;
-
-	return 0;
+	return drmm_add_action_or_reset(&gt_to_xe(gt)->drm, gt_fini, gt);
 }
 
 static int do_gt_reset(struct xe_gt *gt)

drivers/gpu/drm/xe/xe_guc_pc.c

@@ -937,9 +937,5 @@ int xe_guc_pc_init(struct xe_guc_pc *pc)
 
 	pc->bo = bo;
 
-	err = drmm_add_action_or_reset(&xe->drm, xe_guc_pc_fini, pc);
-	if (err)
-		return err;
-
-	return 0;
+	return drmm_add_action_or_reset(&xe->drm, xe_guc_pc_fini, pc);
 }

drivers/gpu/drm/xe/xe_hw_engine.c

@@ -550,11 +550,7 @@ static int hw_engine_init(struct xe_gt *gt, struct xe_hw_engine *hwe,
 	if (xe->info.has_usm && hwe->class == XE_ENGINE_CLASS_COPY)
 		gt->usm.reserved_bcs_instance = hwe->instance;
 
-	err = drmm_add_action_or_reset(&xe->drm, hw_engine_fini, hwe);
-	if (err)
-		return err;
-
-	return 0;
+	return drmm_add_action_or_reset(&xe->drm, hw_engine_fini, hwe);
 
 err_kernel_lrc:
 	xe_lrc_finish(&hwe->kernel_lrc);