From: Rafael J. Wysocki rafael.j.wysocki@intel.com
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@intel.com Cc: 3.10+ stable@vger.kernel.org # 3.10+ Reviewed-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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;