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Subject[PATCH 22/36] PM: Make wakeup flags available whenever CONFIG_PM is set
Date
From: Alan Stern <stern@rowland.harvard.edu>

The various wakeup flags and their accessor macros in struct
dev_pm_info should be available whenever CONFIG_PM is enabled, not
just when CONFIG_PM_SLEEP is on. Otherwise remote wakeup won't always
be configurable for runtime power management. This patch (as1056b)
fixes the oversight.

David Brownell adds:
More accurately, fixes the "regression" ... as noted sometime
last summer, after 296699de6bdc717189a331ab6bbe90e05c94db06
introduced CONFIG_SUSPEND. But that didn't make the regression
list for that kernel, ergo the delay in fixing it.

[rjw: rebased]

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/base/power/main.c | 2 --
drivers/base/power/sysfs.c | 2 ++
include/linux/pm.h | 36 +++++++++++++++++++++---------------
3 files changed, 23 insertions(+), 17 deletions(-)
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 93a1469..5630af3 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -57,8 +57,6 @@ static DEFINE_MUTEX(dpm_list_mtx);
/* 'true' if all devices have been suspended, protected by dpm_list_mtx */
static bool all_sleeping;

-int (*platform_enable_wakeup)(struct device *dev, int is_on);
-
/**
* device_pm_add - add a device to the list of active devices
* @dev: Device to be added to the list
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index f2ed179..d11f74b 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -6,6 +6,8 @@
#include <linux/string.h>
#include "power.h"

+int (*platform_enable_wakeup)(struct device *dev, int is_on);
+

/*
* wakeup - Report/change current wakeup option for device
diff --git a/include/linux/pm.h b/include/linux/pm.h
index e6b9f29..3342627 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -183,9 +183,9 @@ typedef struct pm_message {
struct dev_pm_info {
pm_message_t power_state;
unsigned can_wakeup:1;
+ unsigned should_wakeup:1;
bool sleeping:1; /* Owned by the PM core */
#ifdef CONFIG_PM_SLEEP
- unsigned should_wakeup:1;
struct list_head entry;
#endif
};
@@ -198,11 +198,6 @@ extern void device_resume(void);
extern int device_suspend(pm_message_t state);
extern int device_prepare_suspend(pm_message_t state);

-#define device_set_wakeup_enable(dev,val) \
- ((dev)->power.should_wakeup = !!(val))
-#define device_may_wakeup(dev) \
- (device_can_wakeup(dev) && (dev)->power.should_wakeup)
-
extern void __suspend_report_result(const char *function, void *fn, int ret);

#define suspend_report_result(fn, ret) \
@@ -210,6 +205,24 @@ extern void __suspend_report_result(const char *function, void *fn, int ret);
__suspend_report_result(__FUNCTION__, fn, ret); \
} while (0)

+#else /* !CONFIG_PM_SLEEP */
+
+static inline int device_suspend(pm_message_t state)
+{
+ return 0;
+}
+
+#define suspend_report_result(fn, ret) do { } while (0)
+
+#endif /* !CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM
+
+#define device_set_wakeup_enable(dev,val) \
+ ((dev)->power.should_wakeup = !!(val))
+#define device_may_wakeup(dev) \
+ (device_can_wakeup(dev) && (dev)->power.should_wakeup)
+
/*
* Platform hook to activate device wakeup capability, if that's not already
* handled by enable_irq_wake() etc.
@@ -224,24 +237,17 @@ static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
return 0;
}

-#else /* !CONFIG_PM_SLEEP */
-
-static inline int device_suspend(pm_message_t state)
-{
- return 0;
-}
+#else /* !CONFIG_PM */

#define device_set_wakeup_enable(dev,val) do{}while(0)
#define device_may_wakeup(dev) (0)

-#define suspend_report_result(fn, ret) do { } while (0)
-
static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
{
return 0;
}

-#endif /* !CONFIG_PM_SLEEP */
+#endif /* !CONFIG_PM */

/* changes to device_may_wakeup take effect on the next pm state change.
* by default, devices should wakeup if they can.
--
1.5.4.5


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