diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-05-20 23:09:49 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-07 18:23:42 -0700 |
| commit | 41103c791d4af40643183825d61eb7bb34282ac3 (patch) | |
| tree | 18a15adaa6c8974c466378e772acc39f9099ef47 | |
| parent | b64a69a65e749d9d09851963e3bbbad8f858d946 (diff) | |
| download | lwn-41103c791d4af40643183825d61eb7bb34282ac3.tar.gz lwn-41103c791d4af40643183825d61eb7bb34282ac3.zip | |
PM / sleep: Handle failures in device_suspend_late() consistently
commit 3a17fb329da68cb00558721aff876a80bba2fdb9 upstream.
Grygorii Strashko reports:
The PM runtime will be left disabled for the device if its
.suspend_late() callback fails and async suspend is not allowed
for this device. In this case device will not be added in
dpm_late_early_list and dpm_resume_early() will ignore this
device, as result PM runtime will be disabled for it forever
(side effect: after 8 subsequent failures for the same device
the PM runtime will be reenabled due to disable_depth overflow).
To fix this problem, add devices to dpm_late_early_list regardless
of whether or not device_suspend_late() returns errors for them.
That will ensure failures in there to be handled consistently for
all devices regardless of their async suspend/resume status.
Reported-by: Grygorii Strashko <grygorii.strashko@ti.com>
Tested-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/base/power/main.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 6e7c3ccea24b..27aea96036c4 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -1267,14 +1267,15 @@ int dpm_suspend_late(pm_message_t state) error = device_suspend_late(dev); mutex_lock(&dpm_list_mtx); + if (!list_empty(&dev->power.entry)) + list_move(&dev->power.entry, &dpm_late_early_list); + if (error) { pm_dev_err(dev, state, " late", error); dpm_save_failed_dev(dev_name(dev)); put_device(dev); break; } - if (!list_empty(&dev->power.entry)) - list_move(&dev->power.entry, &dpm_late_early_list); put_device(dev); if (async_error) |