USB: sierra: refactor delayed-urb submission

Refactor and clean up delayed-urb submission at resume.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/sierra.c

@@ -981,12 +981,51 @@ static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
 	return 0;
 }
 
+/* Caller must hold susp_lock. */
+static int sierra_submit_delayed_urbs(struct usb_serial_port *port)
+{
+	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
+	struct sierra_intf_private *intfdata;
+	struct urb *urb;
+	int ec = 0;
+	int err;
+
+	intfdata = usb_get_serial_data(port->serial);
+
+	for (;;) {
+		urb = usb_get_from_anchor(&portdata->delayed);
+		if (!urb)
+			break;
+
+		usb_anchor_urb(urb, &portdata->active);
+		intfdata->in_flight++;
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err) {
+			dev_err(&port->dev, "%s - submit urb failed: %d",
+					__func__, err);
+			ec++;
+			intfdata->in_flight--;
+			usb_unanchor_urb(urb);
+			kfree(urb->transfer_buffer);
+			usb_free_urb(urb);
+
+			spin_lock(&portdata->lock);
+			portdata->outstanding_urbs--;
+			spin_unlock(&portdata->lock);
+		}
+	}
+
+	if (ec)
+		return -EIO;
+
+	return 0;
+}
+
 static int sierra_resume(struct usb_serial *serial)
 {
 	struct usb_serial_port *port;
 	struct sierra_intf_private *intfdata = usb_get_serial_data(serial);
 	struct sierra_port_private *portdata;
-	struct urb *urb;
 	int ec = 0;
 	int i, err;
 
@@ -998,25 +1037,9 @@ static int sierra_resume(struct usb_serial *serial)
 		if (!portdata || !portdata->opened)
 			continue;
 
-		while ((urb = usb_get_from_anchor(&portdata->delayed))) {
-			usb_anchor_urb(urb, &portdata->active);
-			intfdata->in_flight++;
-			err = usb_submit_urb(urb, GFP_ATOMIC);
-			if (err < 0) {
-				dev_err(&port->dev,
-					"%s - submit urb failed: %d",
-					__func__, err);
-				ec++;
-				intfdata->in_flight--;
-				usb_unanchor_urb(urb);
-				kfree(urb->transfer_buffer);
-				usb_free_urb(urb);
-				spin_lock(&portdata->lock);
-				portdata->outstanding_urbs--;
-				spin_unlock(&portdata->lock);
-				continue;
-			}
-		}
+		err = sierra_submit_delayed_urbs(port);
+		if (err)
+			ec++;
 
 		err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
 		if (err)