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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2012-08-15 21:32:04 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-08-17 19:36:36 +0200 |
| commit | 55d7ec4520e86d735d178c15d7df33d507bd43c6 (patch) | |
| tree | f514c1b9173c5b7ff580970b6a249360cee04348 | |
| parent | 58a34de7b1a920d287d17d2ca08bc9aaf7e6d35b (diff) | |
| download | op-kernel-dev-55d7ec4520e86d735d178c15d7df33d507bd43c6.zip op-kernel-dev-55d7ec4520e86d735d178c15d7df33d507bd43c6.tar.gz | |
PM / Runtime: Check device PM QoS setting before "no callbacks" check
If __dev_pm_qos_read_value(dev) returns a negative value,
rpm_suspend() should return -EPERM for dev even if its
power.no_callbacks flag is set. For this to happen, the device's
power.no_callbacks flag has to be checked after the PM QoS check,
so move the PM QoS check to rpm_check_suspend_allowed() (this will
make it cover idle notifications as well as runtime suspend too).
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/base/power/runtime.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index b6e9d9b..7d9c1cb 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -147,6 +147,8 @@ static int rpm_check_suspend_allowed(struct device *dev) || (dev->power.request_pending && dev->power.request == RPM_REQ_RESUME)) retval = -EAGAIN; + else if (__dev_pm_qos_read_value(dev) < 0) + retval = -EPERM; else if (dev->power.runtime_status == RPM_SUSPENDED) retval = 1; @@ -402,12 +404,6 @@ static int rpm_suspend(struct device *dev, int rpmflags) goto out; } - if (__dev_pm_qos_read_value(dev) < 0) { - /* Negative PM QoS constraint means "never suspend". */ - retval = -EPERM; - goto out; - } - __update_runtime_status(dev, RPM_SUSPENDING); if (dev->pm_domain) |
