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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-12-03 21:04:08 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2009-12-06 16:17:57 +0100 |
| commit | e1b1903eee71c5fa6063bbf713cfc947e76c4e04 (patch) | |
| tree | faacfdb379efb58ac89f2d16fc4ee6c938637887 /Documentation/power | |
| parent | PM / Runtime: Ensure timer_expires is nonzero in pm_schedule_suspend() (diff) | |
| download | linux-e1b1903eee71c5fa6063bbf713cfc947e76c4e04.tar.xz linux-e1b1903eee71c5fa6063bbf713cfc947e76c4e04.zip | |
PM / Runtime: Make documentation of runtime_idle() agree with the code
Currently the ->runtime_idle() callback is documented as having no
return value, but in fact it returns int. Although its return value
is ignored at the PM core level, it may be used by bus type routines
executing the drivers' ->runtime_idle() callbacks.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Diffstat (limited to 'Documentation/power')
| -rw-r--r-- | Documentation/power/runtime_pm.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index f49a33b704d2..6bb25cb24da9 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -38,7 +38,7 @@ struct dev_pm_ops { ... int (*runtime_suspend)(struct device *dev); int (*runtime_resume)(struct device *dev); - void (*runtime_idle)(struct device *dev); + int (*runtime_idle)(struct device *dev); ... }; @@ -114,7 +114,8 @@ The action performed by a bus type's ->runtime_idle() callback is totally dependent on the bus type in question, but the expected and recommended action is to check if the device can be suspended (i.e. if all of the conditions necessary for suspending the device are satisfied) and to queue up a suspend -request for the device in that case. +request for the device in that case. The value returned by this callback is +ignored by the PM core. The helper functions provided by the PM core, described in Section 4, guarantee that the following constraints are met with respect to the bus type's run-time |