From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Thu, 23 Feb 2017 23:25:28 +0000 (+0100)
Subject: PM / hibernate: Untangle power_down()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=81d45bdf8913;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

PM / hibernate: Untangle power_down()

The power_down() routine in the core hibernation code is not exactly
straightforward (to put it lightly), so clean it up to make it avoid
invoking itself recursively, among other things.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index b26dbc48c75b..f251b4d32913 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -608,6 +608,22 @@ static void power_down(void)
 {
 #ifdef CONFIG_SUSPEND
 	int error;
+
+	if (hibernation_mode == HIBERNATION_SUSPEND) {
+		error = suspend_devices_and_enter(PM_SUSPEND_MEM);
+		if (error) {
+			hibernation_mode = hibernation_ops ?
+						HIBERNATION_PLATFORM :
+						HIBERNATION_SHUTDOWN;
+		} else {
+			/* Restore swap signature. */
+			error = swsusp_unmark();
+			if (error)
+				pr_err("PM: Swap will be unusable! Try swapon -a.\n");
+
+			return;
+		}
+	}
 #endif
 
 	switch (hibernation_mode) {
@@ -620,25 +636,6 @@ static void power_down(void)
 		if (pm_power_off)
 			kernel_power_off();
 		break;
-#ifdef CONFIG_SUSPEND
-	case HIBERNATION_SUSPEND:
-		error = suspend_devices_and_enter(PM_SUSPEND_MEM);
-		if (error) {
-			if (hibernation_ops)
-				hibernation_mode = HIBERNATION_PLATFORM;
-			else
-				hibernation_mode = HIBERNATION_SHUTDOWN;
-			power_down();
-		}
-		/*
-		 * Restore swap signature.
-		 */
-		error = swsusp_unmark();
-		if (error)
-			printk(KERN_ERR "PM: Swap will be unusable! "
-			                "Try swapon -a.\n");
-		return;
-#endif
 	}
 	kernel_halt();
 	/*