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PM: describe kernel policy regarding wakeup defaults (v. 2)

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This patch (as1381b) updates a comment describing the kernel's policy
toward enabling wakeup by default.

It also makes device_set_wakeup_capable() actually do something when
CONFIG_PM isn't enabled.  It's not clear this is necessary; however if
it isn't then device_init_wakeup() and device_can_wakeup() should also
be do-nothing routines.  Furthermore, I don't expect this change to
have any noticeable effect -- but if it does then clearly the old
behavior was wrong.

Signed-off-by: Alan Stern <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Alan Stern authored and Rafael J. Wysocki committed 2010-07-19 01:58:48 +02:00
1 parent 9013367339
commit 2430d12c94
1 file changed
+7 -3
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include/linux/pm_wakeup.h
+7 -3
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@@ -29,8 +29,11 @@
#ifdef CONFIG_PM
/* changes to device_may_wakeup take effect on the next pm state change.
* by default, devices should wakeup if they can.
/* Changes to device_may_wakeup take effect on the next pm state change.
*
* By default, most devices should leave wakeup disabled. The exceptions
* are devices that everyone expects to be wakeup sources: keyboards,
* power buttons, possibly network interfaces, etc.
*/
static inline void device_init_wakeup(struct device *dev, bool val)
{
@@ -59,7 +62,7 @@ static inline bool device_may_wakeup(struct device *dev)
#else /* !CONFIG_PM */
/* For some reason the next two routines work even without CONFIG_PM */
/* For some reason the following routines work even without CONFIG_PM */
static inline void device_init_wakeup(struct device *dev, bool val)
{
dev->power.can_wakeup = val;
@@ -67,6 +70,7 @@ static inline void device_init_wakeup(struct device *dev, bool val)
static inline void device_set_wakeup_capable(struct device *dev, bool capable)
{
dev->power.can_wakeup = capable;
}
static inline bool device_can_wakeup(struct device *dev)