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authorRafael J. Wysocki <rjw@sisk.pl>2011-02-09 01:26:02 +0300
committerRafael J. Wysocki <rjw@sisk.pl>2011-03-15 02:43:14 +0300
commitcb8f51bdadb7969139c2e39c2defd4cde98c1ea8 (patch)
treea6d6e20878460d50b8f61d5fe3237818c54065eb /include/linux/pm_runtime.h
parent4681b17154b3fd81f898802262985f662344e6ed (diff)
downloadlinux-cb8f51bdadb7969139c2e39c2defd4cde98c1ea8.tar.xz
PM: Do not create wakeup sysfs files for devices that cannot wake up
Currently, wakeup sysfs attributes are created for all devices, regardless of whether or not they are wakeup-capable. This is excessive and complicates wakeup device identification from user space (i.e. to identify wakeup-capable devices user space has to read /sys/devices/.../power/wakeup for all devices and see if they are not empty). Fix this issue by avoiding to create wakeup sysfs files for devices that cannot wake up the system from sleep states (i.e. whose power.can_wakeup flags are unset during registration) and modify device_set_wakeup_capable() so that it adds (or removes) the relevant sysfs attributes if a device's wakeup capability status is changed. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'include/linux/pm_runtime.h')
-rw-r--r--include/linux/pm_runtime.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index d34f067e2a7f..8de9aa6e7def 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -87,6 +87,11 @@ static inline bool pm_runtime_enabled(struct device *dev)
return !dev->power.disable_depth;
}
+static inline bool pm_runtime_callbacks_present(struct device *dev)
+{
+ return !dev->power.no_callbacks;
+}
+
static inline void pm_runtime_mark_last_busy(struct device *dev)
{
ACCESS_ONCE(dev->power.last_busy) = jiffies;
@@ -133,6 +138,7 @@ static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
static inline void pm_runtime_no_callbacks(struct device *dev) {}
static inline void pm_runtime_irq_safe(struct device *dev) {}
+static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
static inline void pm_runtime_mark_last_busy(struct device *dev) {}
static inline void __pm_runtime_use_autosuspend(struct device *dev,
bool use) {}