diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-10-16 23:34:36 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-10-22 00:19:29 +0200 |
| commit | 4ca46ff3e0d8c234cb40ebb6457653b59584426c (patch) | |
| tree | b929bbc30d5e08b1ba4be980c473f9d594a42b58 /include/linux | |
| parent | cd0ea672f58d5cfdea271c45cec0c897f2b792aa (diff) | |
PM / Sleep: Mark devices involved in wakeup signaling during suspend
The generic PM domains code in drivers/base/power/domain.c has
to avoid powering off domains that provide power to wakeup devices
during system suspend. Currently, however, this only works for
wakeup devices directly belonging to the given domain and not for
their children (or the children of their children and so on).
Thus, if there's a wakeup device whose parent belongs to a power
domain handled by the generic PM domains code, the domain will be
powered off during system suspend preventing the device from
signaling wakeup.
To address this problem introduce a device flag, power.wakeup_path,
that will be set during system suspend for all wakeup devices,
their parents, the parents of their parents and so on. This way,
all wakeup paths in the device hierarchy will be marked and the
generic PM domains code will only need to avoid powering off
domains containing devices whose power.wakeup_path is set.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index f25682477f08..74711a9c2f69 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -448,6 +448,7 @@ struct dev_pm_info { struct list_head entry; struct completion completion; struct wakeup_source *wakeup; + bool wakeup_path:1; #else unsigned int should_wakeup:1; #endif |