PM / Runtime: Allow helpers to be called by early platform drivers
Runtime PM helper functions, like pm_runtime_get_sync(), cannot be
called by early platform device drivers, because the devices' power
management locks are not initialized at that time. This is quite
inconvenient, so modify early_platform_add_devices() to initialize
the devices power management locks as appropriate and make sure that
they won't be initialized more than once if an early platform
device is going to be used as a regular one later.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index a1a7225..d51514b 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -22,6 +22,7 @@
#include <linux/pm_runtime.h>
#include "base.h"
+#include "power/power.h"
#define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
driver))
@@ -948,6 +949,7 @@
dev = &devs[i]->dev;
if (!dev->devres_head.next) {
+ pm_runtime_early_init(dev);
INIT_LIST_HEAD(&dev->devres_head);
list_add_tail(&dev->devres_head,
&early_platform_device_list);