Commit 0fcb4eef authored by Alan Stern's avatar Alan Stern Committed by Rafael J. Wysocki
Browse files

PM / Runtime: Make runtime_status attribute not debug-only (v. 2) 



This patch (as1404b) makes the runtime_status sysfs attribute available
even in the absence of CONFIG_PM_ADVANCED_DEBUG, and it changes the
routine to display "unsupported" when runtime PM is disabled for a
device.  Although not strictly 100% accurate, this will almost always
be correct.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Acked-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
parent 4eb241e5

drivers/base/power/sysfs.c

+33 −20
Original line number Diff line number Diff line
@@ -110,6 +110,38 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr, 
}



static DEVICE_ATTR(control, 0644, control_show, control_store);



static ssize_t rtpm_status_show(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	const char *p;



	if (dev->power.runtime_error) {

		p = "error\n";

	} else if (dev->power.disable_depth) {

		p = "unsupported\n";

	} else {

		switch (dev->power.runtime_status) {

		case RPM_SUSPENDED:

			p = "suspended\n";

			break;

		case RPM_SUSPENDING:

			p = "suspending\n";

			break;

		case RPM_RESUMING:

			p = "resuming\n";

			break;

		case RPM_ACTIVE:

			p = "active\n";

			break;

		default:

			return -EIO;

		}

	}

	return sprintf(buf, p);

}



static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL);

#endif



static ssize_t
@@ -184,27 +216,8 @@ static ssize_t rtpm_enabled_show(struct device *dev, 
	return sprintf(buf, "enabled\n");

}



static ssize_t rtpm_status_show(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	if (dev->power.runtime_error)

		return sprintf(buf, "error\n");

	switch (dev->power.runtime_status) {

	case RPM_SUSPENDED:

		return sprintf(buf, "suspended\n");

	case RPM_SUSPENDING:

		return sprintf(buf, "suspending\n");

	case RPM_RESUMING:

		return sprintf(buf, "resuming\n");

	case RPM_ACTIVE:

		return sprintf(buf, "active\n");

	}

	return -EIO;

}



static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL);

static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL);

static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL);

static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL);



#endif
@@ -240,6 +253,7 @@ static DEVICE_ATTR(async, 0644, async_show, async_store); 
static struct attribute * power_attrs[] = {

#ifdef CONFIG_PM_RUNTIME

	&dev_attr_control.attr,

	&dev_attr_runtime_status.attr,

#endif

	&dev_attr_wakeup.attr,

#ifdef CONFIG_PM_SLEEP
@@ -250,7 +264,6 @@ static struct attribute * power_attrs[] = { 
#ifdef CONFIG_PM_RUNTIME

	&dev_attr_runtime_usage.attr,

	&dev_attr_runtime_active_kids.attr,

	&dev_attr_runtime_status.attr,

	&dev_attr_runtime_enabled.attr,

#endif

#endif

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