PM / QoS: Resume device before exposing/hiding PM QoS flags
Since dev_pm_qos_add_request(), dev_pm_qos_update_request() and
dev_pm_qos_remove_request() for PM QoS flags should not be invoked
when device in RPM_SUSPENDED, add pm_runtime_get_sync() and pm_runtime_put()
around these functions in dev_pm_qos_expose_flags() and
dev_pm_qos_hide_flags().
[rjw: Modified the subject and changelog to better reflect the code
changes made.]
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 081db2d..fdc3894 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -633,15 +633,18 @@
if (!req)
return -ENOMEM;
+ pm_runtime_get_sync(dev);
ret = dev_pm_qos_add_request(dev, req, DEV_PM_QOS_FLAGS, val);
if (ret < 0)
- return ret;
+ goto fail;
dev->power.qos->flags_req = req;
ret = pm_qos_sysfs_add_flags(dev);
if (ret)
__dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_FLAGS);
+fail:
+ pm_runtime_put(dev);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_qos_expose_flags);
@@ -654,7 +657,9 @@
{
if (dev->power.qos && dev->power.qos->flags_req) {
pm_qos_sysfs_remove_flags(dev);
+ pm_runtime_get_sync(dev);
__dev_pm_qos_drop_user_request(dev, DEV_PM_QOS_FLAGS);
+ pm_runtime_put(dev);
}
}
EXPORT_SYMBOL_GPL(dev_pm_qos_hide_flags);