USB: serial: io_edgeport: 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: <linux-usb-devel@lists.sourceforge.net>
Cc: Al Borchers <alborchers@steinerpoint.com>
Cc: Peter Berger <pberger@brimson.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/io_edgeport.c

@@ -599,10 +599,11 @@ static void edge_interrupt_callback (struct urb *urb)
 	int txCredits;
 	int portNumber;
 	int result;
+	int status = urb->status;
 
 	dbg("%s", __FUNCTION__);
 
-	switch (urb->status) {
+	switch (status) {
 	case 0:
 		/* success */
 		break;
@@ -610,10 +611,12 @@ static void edge_interrupt_callback (struct urb *urb)
 	case -ENOENT:
 	case -ESHUTDOWN:
 		/* this urb is terminated, clean up */
-		dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+		dbg("%s - urb shutting down with status: %d",
+		    __FUNCTION__, status);
 		return;
 	default:
-		dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
+		dbg("%s - nonzero urb status received: %d",
+		    __FUNCTION__, status);
 		goto exit;
 	}
 
@@ -688,13 +691,15 @@ static void edge_bulk_in_callback (struct urb *urb)
 {
 	struct edgeport_serial	*edge_serial = (struct edgeport_serial *)urb->context;
 	unsigned char		*data = urb->transfer_buffer;
-	int			status;
+	int			retval;
 	__u16			raw_data_length;
+	int status = urb->status;
 
 	dbg("%s", __FUNCTION__);
 
-	if (urb->status) {
-		dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
+	if (status) {
+		dbg("%s - nonzero read bulk status received: %d",
+		    __FUNCTION__, status);
 		edge_serial->read_in_progress = false;
 		return;
 	}
@@ -722,9 +727,11 @@ static void edge_bulk_in_callback (struct urb *urb)
 	if (edge_serial->rxBytesAvail > 0) {
 		dbg("%s - posting a read", __FUNCTION__);
 		edge_serial->read_urb->dev = edge_serial->serial->dev;
-		status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
-		if (status) {
-			dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status);
+		retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
+		if (retval) {
+			dev_err(&urb->dev->dev,
+				"%s - usb_submit_urb(read bulk) failed, "
+				"retval = %d\n", __FUNCTION__, retval);
 			edge_serial->read_in_progress = false;
 		}
 	} else {
@@ -744,11 +751,13 @@ static void edge_bulk_out_data_callback (struct urb *urb)
 {
 	struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
 	struct tty_struct *tty;
+	int status = urb->status;
 
 	dbg("%s", __FUNCTION__);
 
-	if (urb->status) {
-		dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
+	if (status) {
+		dbg("%s - nonzero write bulk status received: %d",
+		    __FUNCTION__, status);
 	}
 
 	tty = edge_port->port->tty;