PM: Make ACPI wakeup from S5 work again when CONFIG_PM_SLEEP is unset
Rafael J. Wysocki [Thu, 24 Feb 2011 10:10:01 +0000 (11:10 +0100)]
Commit 074037e (PM / Wakeup: Introduce wakeup source objects and
event statistics (v3)) caused ACPI wakeup to only work if
CONFIG_PM_SLEEP is set, but it also worked for CONFIG_PM_SLEEP unset
before.  This can be fixed by making device_set_wakeup_enable(),
device_init_wakeup() and device_may_wakeup() work in the same way
as before commit 074037e when CONFIG_PM_SLEEP is unset.

Reported-and-tested-by: Justin Maggard <jmaggard10@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

include/linux/pm.h
include/linux/pm_wakeup.h

index dd9c7ab..21415cc 100644 (file)
@@ -431,6 +431,8 @@ struct dev_pm_info {
        struct list_head        entry;
        struct completion       completion;
        struct wakeup_source    *wakeup;
+#else
+       unsigned int            should_wakeup:1;
 #endif
 #ifdef CONFIG_PM_RUNTIME
        struct timer_list       suspend_timer;
index 9cff00d..03a67db 100644 (file)
@@ -109,11 +109,6 @@ static inline bool device_can_wakeup(struct device *dev)
        return dev->power.can_wakeup;
 }
 
-static inline bool device_may_wakeup(struct device *dev)
-{
-       return false;
-}
-
 static inline struct wakeup_source *wakeup_source_create(const char *name)
 {
        return NULL;
@@ -134,24 +129,32 @@ static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
 
 static inline int device_wakeup_enable(struct device *dev)
 {
-       return -EINVAL;
+       dev->power.should_wakeup = true;
+       return 0;
 }
 
 static inline int device_wakeup_disable(struct device *dev)
 {
+       dev->power.should_wakeup = false;
        return 0;
 }
 
-static inline int device_init_wakeup(struct device *dev, bool val)
+static inline int device_set_wakeup_enable(struct device *dev, bool enable)
 {
-       dev->power.can_wakeup = val;
-       return val ? -EINVAL : 0;
+       dev->power.should_wakeup = enable;
+       return 0;
 }
 
+static inline int device_init_wakeup(struct device *dev, bool val)
+{
+       device_set_wakeup_capable(dev, val);
+       device_set_wakeup_enable(dev, val);
+       return 0;
+}
 
-static inline int device_set_wakeup_enable(struct device *dev, bool enable)
+static inline bool device_may_wakeup(struct device *dev)
 {
-       return -EINVAL;
+       return dev->power.can_wakeup && dev->power.should_wakeup;
 }
 
 static inline void __pm_stay_awake(struct wakeup_source *ws) {}