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Merge branch 'pm-runtime' into pm-for-linus

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* pm-runtime:
  PM / Runtime: Handle .runtime_suspend() failure correctly
  PM / Runtime: Fix kerneldoc comment for rpm_suspend()
  PM / Runtime: Update document about callbacks
This commit is contained in:
Rafael J. Wysocki
2011-10-16 23:26:49 +02:00
parent 7811ac276b 857b36c7b0
commit 9bd717c0dc
2 changed files with 30 additions and 22 deletions
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33
drivers/base/power/runtime.c
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@ -286,14 +286,16 @@ static int rpm_callback(int (*cb)(struct device *), struct device *dev)
* @dev: Device to suspend.
* @rpmflags: Flag bits.
*
* Check if the device's runtime PM status allows it to be suspended. If
* another suspend has been started earlier, either return immediately or wait
* for it to finish, depending on the RPM_NOWAIT and RPM_ASYNC flags. Cancel a
* pending idle notification. If the RPM_ASYNC flag is set then queue a
* suspend request; otherwise run the ->runtime_suspend() callback directly.
* If a deferred resume was requested while the callback was running then carry
* it out; otherwise send an idle notification for the device (if the suspend
* failed) or for its parent (if the suspend succeeded).
* Check if the device's runtime PM status allows it to be suspended.
* Cancel a pending idle notification, autosuspend or suspend. If
* another suspend has been started earlier, either return immediately
* or wait for it to finish, depending on the RPM_NOWAIT and RPM_ASYNC
* flags. If the RPM_ASYNC flag is set then queue a suspend request;
* otherwise run the ->runtime_suspend() callback directly. When
* ->runtime_suspend succeeded, if a deferred resume was requested while
* the callback was running then carry it out, otherwise send an idle
* notification for its parent (if the suspend succeeded and both
* ignore_children of parent->power and irq_safe of dev->power are not set).
*
* This function must be called under dev->power.lock with interrupts disabled.
*/
@ -418,15 +420,16 @@ static int rpm_suspend(struct device *dev, int rpmflags)
dev->power.runtime_error = 0;
else
pm_runtime_cancel_pending(dev);
} else {
wake_up_all(&dev->power.wait_queue);
goto out;
}
no_callback:
__update_runtime_status(dev, RPM_SUSPENDED);
pm_runtime_deactivate_timer(dev);
__update_runtime_status(dev, RPM_SUSPENDED);
pm_runtime_deactivate_timer(dev);
if (dev->parent) {
parent = dev->parent;
atomic_add_unless(&parent->power.child_count, -1, 0);
}
if (dev->parent) {
parent = dev->parent;
atomic_add_unless(&parent->power.child_count, -1, 0);
}
wake_up_all(&dev->power.wait_queue);