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USB: serial: enable async suspend for usb serial port device

Usb serial port device is child of its usb interface device, so
we can enable async suspend of usb serial port device to speedup
system suspend.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Ming Lei 15 年之前
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共有 1 個文件被更改,包括 2 次插入0 次删除
  1. 2 0
      drivers/usb/serial/usb-serial.c

+ 2 - 0
drivers/usb/serial/usb-serial.c

@@ -1071,6 +1071,8 @@ int usb_serial_probe(struct usb_interface *interface,
 		dev_set_name(&port->dev, "ttyUSB%d", port->number);
 		dbg ("%s - registering %s", __func__, dev_name(&port->dev));
 		port->dev_state = PORT_REGISTERING;
+		device_enable_async_suspend(&port->dev);
+
 		retval = device_add(&port->dev);
 		if (retval) {
 			dev_err(&port->dev, "Error registering port device, "