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| author | Johan Hovold <johan@kernel.org> | 2017-07-24 11:53:56 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-27 23:57:40 +0200 |
| commit | c3bf5bb521907e7b5a574ae7a2734df3acb11c2f (patch) | |
| tree | 7099c47d625414db7521b73a0e0ed5624cc3cd1b /Documentation | |
| parent | 520eccdfe187591a51ea9ab4c1a024ae4d0f68d9 (diff) | |
| download | lwn-c3bf5bb521907e7b5a574ae7a2734df3acb11c2f.tar.gz lwn-c3bf5bb521907e7b5a574ae7a2734df3acb11c2f.zip | |
PM / runtime: Document new pm_runtime_set_suspended() constraint
Since commit a8636c89648a (PM / Runtime: Don't allow to suspend a
device with an active child) it is no longer permitted to set
RPM_SUSPENDED state for a device with active children unless
power.ignore_children is set.
Update the documentation to reflect this.
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/power/runtime_pm.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index 0fde3dcf077a..625549d4c74a 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -435,7 +435,8 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h: PM status to 'suspended' and update its parent's counter of 'active' children as appropriate (it is only valid to use this function if 'power.runtime_error' is set or 'power.disable_depth' is greater than - zero) + zero); it will fail and return an error code if the device has a child + which is active and the 'power.ignore_children' flag is unset bool pm_runtime_active(struct device *dev); - return true if the device's runtime PM status is 'active' or its |