USB: serial: aircable: clean up urb->status usage

This done in anticipation of removal of urb->status, which will make
that patch easier to review and apply in the future.


Cc: <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/serial/aircable.c

···
 static void aircable_write_bulk_callback(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
+	int status = urb->status;
 	int result;
 
-	dbg("%s - urb->status: %d", __FUNCTION__ , urb->status);
+	dbg("%s - urb status: %d", __FUNCTION__ , status);
 
 	/* This has been taken from cypress_m8.c cypress_write_int_callback */
-	switch (urb->status) {
+	switch (status) {
 		case 0:
 			/* success */
 			break;
···
 		case -ESHUTDOWN:
 			/* this urb is terminated, clean up */
 			dbg("%s - urb shutting down with status: %d",
-			    __FUNCTION__, urb->status);
+			    __FUNCTION__, status);
 			port->write_urb_busy = 0;
 			return;
 		default:
 			/* error in the urb, so we have to resubmit it */
 			dbg("%s - Overflow in write", __FUNCTION__);
 			dbg("%s - nonzero write bulk status received: %d",
-			    __FUNCTION__, urb->status);
+			    __FUNCTION__, status);
 			port->write_urb->transfer_buffer_length = 1;
 			port->write_urb->dev = port->serial->dev;
 			result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
···
 	unsigned long no_packages, remaining, package_length, i;
 	int result, shift = 0;
 	unsigned char *temp;
+	int status = urb->status;
 
 	dbg("%s - port %d", __FUNCTION__, port->number);
 
-	if (urb->status) {
-		dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
+	if (status) {
+		dbg("%s - urb status = %d", __FUNCTION__, status);
 		if (!port->open_count) {
 			dbg("%s - port is closed, exiting.", __FUNCTION__);
 			return;
 		}
-		if (urb->status == -EPROTO) {
+		if (status == -EPROTO) {
 			dbg("%s - caught -EPROTO, resubmitting the urb",
 			    __FUNCTION__);
 			usb_fill_bulk_urb(port->read_urb, port->serial->dev,