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

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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>
This commit is contained in:
Ming Lei 2010-07-13 23:56:24 +08:00 committed by Greg Kroah-Hartman
parent d0390d92bf
commit a7a6b79bc5
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/serial/usb-serial.c
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@ -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, "