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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-10-22 14:58:23 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-10-22 18:09:58 +0200 |
| commit | 928265e3601cde78c7e0a3e518a93b27defed3b1 (patch) | |
| tree | 3e2533861449ddcfc5dac654c5f67154d13ef4a2 /drivers/base | |
| parent | PM: hibernate: Get block device exclusively in swsusp_check() (diff) | |
| download | linux-dev-928265e3601cde78c7e0a3e518a93b27defed3b1.tar.xz linux-dev-928265e3601cde78c7e0a3e518a93b27defed3b1.zip | |
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: 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>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/main.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index cbea78e79f3d..fca6eab871fc 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -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; |