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Diffstat (limited to 'drivers/base/power/runtime.c')
-rw-r--r--drivers/base/power/runtime.c36
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 05793c9fbb..2ee4584148 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -94,6 +94,7 @@ static void update_pm_runtime_accounting(struct device *dev)
static void __update_runtime_status(struct device *dev, enum rpm_status status)
{
update_pm_runtime_accounting(dev);
+ trace_rpm_status(dev, status);
dev->power.runtime_status = status;
}
@@ -1176,7 +1177,7 @@ int __pm_runtime_resume(struct device *dev, int rpmflags)
EXPORT_SYMBOL_GPL(__pm_runtime_resume);
/**
- * pm_runtime_get_if_active - Conditionally bump up device usage counter.
+ * pm_runtime_get_conditional - Conditionally bump up device usage counter.
* @dev: Device to handle.
* @ign_usage_count: Whether or not to look at the current usage counter value.
*
@@ -1197,7 +1198,7 @@ EXPORT_SYMBOL_GPL(__pm_runtime_resume);
* The caller is responsible for decrementing the runtime PM usage counter of
* @dev after this function has returned a positive value for it.
*/
-int pm_runtime_get_if_active(struct device *dev, bool ign_usage_count)
+static int pm_runtime_get_conditional(struct device *dev, bool ign_usage_count)
{
unsigned long flags;
int retval;
@@ -1218,9 +1219,40 @@ int pm_runtime_get_if_active(struct device *dev, bool ign_usage_count)
return retval;
}
+
+/**
+ * pm_runtime_get_if_active - Bump up runtime PM usage counter if the device is
+ * in active state
+ * @dev: Target device.
+ *
+ * Increment the runtime PM usage counter of @dev if its runtime PM status is
+ * %RPM_ACTIVE, in which case it returns 1. If the device is in a different
+ * state, 0 is returned. -EINVAL is returned if runtime PM is disabled for the
+ * device, in which case also the usage_count will remain unmodified.
+ */
+int pm_runtime_get_if_active(struct device *dev)
+{
+ return pm_runtime_get_conditional(dev, true);
+}
EXPORT_SYMBOL_GPL(pm_runtime_get_if_active);
/**
+ * pm_runtime_get_if_in_use - Conditionally bump up runtime PM usage counter.
+ * @dev: Target device.
+ *
+ * Increment the runtime PM usage counter of @dev if its runtime PM status is
+ * %RPM_ACTIVE and its runtime PM usage counter is greater than 0, in which case
+ * it returns 1. If the device is in a different state or its usage_count is 0,
+ * 0 is returned. -EINVAL is returned if runtime PM is disabled for the device,
+ * in which case also the usage_count will remain unmodified.
+ */
+int pm_runtime_get_if_in_use(struct device *dev)
+{
+ return pm_runtime_get_conditional(dev, false);
+}
+EXPORT_SYMBOL_GPL(pm_runtime_get_if_in_use);
+
+/**
* __pm_runtime_set_status - Set runtime PM status of a device.
* @dev: Device to handle.
* @status: New runtime PM status of the device.