PM: hibernate: Combine return paths in power_down()

JIRA: https://issues.redhat.com/browse/RHEL-109250

commit 1f5bcfe
Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date:   Fri Sep 26 18:41:21 2025 +0200

To avoid code duplication and improve clarity, combine the code
paths in power_down() leading to a return from that function.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Link: https://patch.msgid.link/3571055.QJadu78ljV@rafael.j.wysocki
[ rjw: Changed the new label name to "exit" ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>

Author: mlangsdorf

kernel/power/hibernate.c

@@ -660,21 +660,11 @@ static void power_down(void)
 	if (hibernation_mode == HIBERNATION_SUSPEND) {
 		pm_restore_gfp_mask();
 		error = suspend_devices_and_enter(mem_sleep_current);
-		if (error) {
-			hibernation_mode = hibernation_ops ?
-						HIBERNATION_PLATFORM :
-						HIBERNATION_SHUTDOWN;
-		} else {
-			/* Match pm_restore_gfp_mask() call in hibernate() */
-			pm_restrict_gfp_mask();
-
-			/* Restore swap signature. */
-			error = swsusp_unmark();
-			if (error)
-				pr_err("Swap will be unusable! Try swapon -a.\n");
+		if (!error)
+			goto exit;
 
-			return;
-		}
+		hibernation_mode = hibernation_ops ? HIBERNATION_PLATFORM :
+						     HIBERNATION_SHUTDOWN;
 	}
 #endif
 
@@ -685,12 +675,9 @@ static void power_down(void)
 	case HIBERNATION_PLATFORM:
 		error = hibernation_platform_enter();
 		if (error == -EAGAIN || error == -EBUSY) {
-			/* Match pm_restore_gfp_mask() in hibernate(). */
-			pm_restrict_gfp_mask();
-			swsusp_unmark();
 			events_check_enabled = false;
 			pr_info("Wakeup event detected during hibernation, rolling back.\n");
-			return;
+			goto exit;
 		}
 		fallthrough;
 	case HIBERNATION_SHUTDOWN:
@@ -709,6 +696,15 @@ static void power_down(void)
 	pr_crit("Power down manually\n");
 	while (1)
 		cpu_relax();
+
+exit:
+	/* Match the pm_restore_gfp_mask() call in hibernate(). */
+	pm_restrict_gfp_mask();
+
+	/* Restore swap signature. */
+	error = swsusp_unmark();
+	if (error)
+		pr_err("Swap will be unusable! Try swapon -a.\n");
 }
 
 static int load_image_and_restore(void)