usb: squash lines for immediate return

This makes functions much simpler.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

common/usb.c

@@ -557,12 +557,10 @@ int usb_clear_halt(struct usb_device *dev, int pipe)
 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
 			unsigned char index, void *buf, int size)
 {
-	int res;
-	res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
-			USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
-			(type << 8) + index, 0,
-			buf, size, USB_CNTL_TIMEOUT);
-	return res;
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			       USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
+			       (type << 8) + index, 0, buf, size,
+			       USB_CNTL_TIMEOUT);
 }
 
 /**********************************************************************
@@ -612,14 +610,10 @@ int usb_get_configuration_no(struct usb_device *dev, int cfgno,
  */
 static int usb_set_address(struct usb_device *dev)
 {
-	int res;
-
 	debug("set address %d\n", dev->devnum);
-	res = usb_control_msg(dev, usb_snddefctrl(dev),
-				USB_REQ_SET_ADDRESS, 0,
-				(dev->devnum), 0,
-				NULL, 0, USB_CNTL_TIMEOUT);
-	return res;
+
+	return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
+			       0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
 }
 
 /********************************************************************

common/usb_kbd.c

@@ -605,11 +605,8 @@ int usb_kbd_deregister(int force)
 static int usb_kbd_probe(struct udevice *dev)
 {
 	struct usb_device *udev = dev_get_parent_priv(dev);
-	int ret;
-
-	ret = probe_usb_keyboard(udev);
 
-	return ret;
+	return probe_usb_keyboard(udev);
 }
 
 static int usb_kbd_remove(struct udevice *dev)

common/usb_storage.c

@@ -708,13 +708,10 @@ static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 /* clear a stall on an endpoint - special for BBB devices */
 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
 {
-	int result;
-
 	/* ENDPOINT_HALT = 0, so set value to 0 */
-	result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
-				USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
-				0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
-	return result;
+	return usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
+			       USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
+			       endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
 }
 
 static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)

drivers/usb/host/xhci-fsl.c

@@ -129,15 +129,10 @@ static int xhci_fsl_probe(struct udevice *dev)
 static int xhci_fsl_remove(struct udevice *dev)
 {
 	struct xhci_fsl_priv *priv = dev_get_priv(dev);
-	int ret;
 
 	fsl_xhci_core_exit(&priv->ctx);
 
-	ret = xhci_deregister(dev);
-	if (ret)
-		return ret;
-
-	return 0;
+	return xhci_deregister(dev);
 }
 
 static const struct udevice_id xhci_usb_ids[] = {