USB: usb_wwan/option: generalize option_send_setup for other drivers

Only the option driver implements the send_setup callback; it uses the
SET_CONTROL_LINE_STATE request in CDC ACM to generate DTR/RTS signals
on the port. This is not driver-specific though and is needed by other
drivers, so move the function to the usb_wwan driver (with formatting
tweaks), and replace the callback pointer with a flag that enables the
request.

Suggested-by: Bjørn Mork <bjorn@mork.no>
Suggested-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>

1 files changed, 1 insertions, 35 deletions

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 4d16c9744f54..edfaec19e1ae 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -48,7 +48,6 @@ static int  option_probe(struct usb_serial *serial,
 			const struct usb_device_id *id);
 static int option_attach(struct usb_serial *serial);
 static void option_release(struct usb_serial *serial);
-static int option_send_setup(struct usb_serial_port *port);
 static void option_instat_callback(struct urb *urb);
 
 /* Vendor and product IDs */
@@ -1890,7 +1889,7 @@ static int option_attach(struct usb_serial *serial)
 
 	if (!blacklist || !test_bit(iface_desc->bInterfaceNumber,
 						&blacklist->sendsetup)) {
-		data->send_setup = option_send_setup;
+		data->use_send_setup = 1;
 	}
 	spin_lock_init(&data->susp_lock);
 
@@ -1961,39 +1960,6 @@ static void option_instat_callback(struct urb *urb)
 	}
 }
 
-/** send RTS/DTR state to the port.
- *
- * This is exactly the same as SET_CONTROL_LINE_STATE from the PSTN
- * CDC.
-*/
-static int option_send_setup(struct usb_serial_port *port)
-{
-	struct usb_serial *serial = port->serial;
-	struct usb_wwan_port_private *portdata;
-	int ifNum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
-	int val = 0;
-	int res;
-
-	portdata = usb_get_serial_port_data(port);
-
-	if (portdata->dtr_state)
-		val |= 0x01;
-	if (portdata->rts_state)
-		val |= 0x02;
-
-	res = usb_autopm_get_interface(serial->interface);
-	if (res)
-		return res;
-
-	res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
-				0x22, 0x21, val, ifNum, NULL,
-				0, USB_CTRL_SET_TIMEOUT);
-
-	usb_autopm_put_interface(serial->interface);
-
-	return res;
-}
-
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");