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PM: sleep: Do not let "syscore" devices runtime-suspend during system transitions 

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: 057d51a126 ("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>
This commit is contained in:
Rafael J. Wysocki 2021-10-22 14:58:23 +02:00
parent 39fbef4b0f
commit 928265e360
1 changed files with 5 additions and 4 deletions
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9
drivers/base/power/main.c
View File

@ -1051,7 +1051,7 @@ static void device_complete(struct device *dev, pm_message_t state)
const char *info = NULL;
if (dev->power.syscore)
return;
goto out;
device_lock(dev);
@ -1081,6 +1081,7 @@ static void device_complete(struct device *dev, pm_message_t state)
device_unlock(dev);
out:
pm_runtime_put(dev);
}
@ -1794,9 +1795,6 @@ static int device_prepare(struct device *dev, pm_message_t state)
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 *dev, pm_message_t state)
*/
pm_runtime_get_noresume(dev);
if (dev->power.syscore)
return 0;
device_lock(dev);
dev->power.wakeup_path = false;