This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. The pm_qos_no_power_off will
be used to control usb port auto power off mechanism from user space.
Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
---
drivers/usb/core/hub.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 1e9a395..f0e1b29 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1254,6 +1254,7 @@ static void usb_port_device_release(struct device *dev)
{
struct usb_port *port_dev = to_usb_port(dev);
+ dev_pm_qos_hide_flags(dev);
kfree(port_dev);
}
@@ -1289,8 +1290,16 @@ static int usb_hub_create_port_device(struct usb_hub *hub,
retval = device_register(&port_dev->dev);
if (retval)
goto error_register;
+
+ retval = dev_pm_qos_expose_flags(&port_dev->dev,
+ PM_QOS_FLAG_NO_POWER_OFF);
+ if (retval)
+ goto error_expose_pm_qos;
+
return 0;
+error_expose_pm_qos:
+ device_unregister(&port_dev->dev);
error_register:
put_device(&port_dev->dev);
exit:
--
1.7.9.5
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