[PATCH 5.14 128/849] PM: sleep: Do not let "syscore" devices runtime-suspend during system transitions

[Greg Kroah-Hartman]

From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

commit 928265e3601cde78c7e0a3e518a93b27defed3b1 upstream.

There is no reason to allow "syscore" devices to runtime-suspend
during system-wide PM transitions, because they are subject to the
same possible failure modes as any other devices in that respect.

Accordingly, change device_prepare() and device_complete() to call
pm_runtime_get_noresume() and pm_runtime_put(), respectively, for
"syscore" devices too.

Fixes: 057d51a1268f ("Merge branch 'pm-sleep'")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: 3.10+ <stable@xxxxxxxxxxxxxxx> # 3.10+
Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/base/power/main.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1051,7 +1051,7 @@ static void device_complete(struct devic
 	const char *info = NULL;
 
 	if (dev->power.syscore)
-		return;
+		goto out;
 
 	device_lock(dev);
 
@@ -1081,6 +1081,7 @@ static void device_complete(struct devic
 
 	device_unlock(dev);
 
+out:
 	pm_runtime_put(dev);
 }
 
@@ -1794,9 +1795,6 @@ static int device_prepare(struct device
 	int (*callback)(struct device *) = NULL;
 	int ret = 0;
 
-	if (dev->power.syscore)
-		return 0;
-
 	/*
 	 * If a device's parent goes into runtime suspend at the wrong time,
 	 * it won't be possible to resume the device.  To prevent this we
@@ -1805,6 +1803,9 @@ static int device_prepare(struct device
 	 */
 	pm_runtime_get_noresume(dev);
 
+	if (dev->power.syscore)
+		return 0;
+
 	device_lock(dev);
 
 	dev->power.wakeup_path = false;