usb: musb: add helper function musb_ep_xfertype_string

Add helper function musb_ep_xfertype_string() to return the ep transfer
type string.
Signed-off-by: NBin Liu <b-liu@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/musb_core.h

@@ -465,6 +465,30 @@ static inline struct musb *gadget_to_musb(struct usb_gadget *g)
 	return container_of(g, struct musb, g);
 }
 
+static inline char *musb_ep_xfertype_string(u8 type)
+{
+	char *s;
+
+	switch (type) {
+	case USB_ENDPOINT_XFER_CONTROL:
+		s = "ctrl";
+		break;
+	case USB_ENDPOINT_XFER_ISOC:
+		s = "iso";
+		break;
+	case USB_ENDPOINT_XFER_BULK:
+		s = "bulk";
+		break;
+	case USB_ENDPOINT_XFER_INT:
+		s = "int";
+		break;
+	default:
+		s = "";
+		break;
+	}
+	return s;
+}
+
 #ifdef CONFIG_BLACKFIN
 static inline int musb_read_fifosize(struct musb *musb,
 		struct musb_hw_ep *hw_ep, u8 epnum)

drivers/usb/musb/musb_gadget.c

@@ -1105,11 +1105,7 @@ static int musb_gadget_enable(struct usb_ep *ep,
 
 	pr_debug("%s periph: enabled %s for %s %s, %smaxpacket %d\n",
 			musb_driver_name, musb_ep->end_point.name,
-			({ char *s; switch (musb_ep->type) {
-			case USB_ENDPOINT_XFER_BULK:	s = "bulk"; break;
-			case USB_ENDPOINT_XFER_INT:	s = "int"; break;
-			default:			s = "iso"; break;
-			} s; }),
+			musb_ep_xfertype_string(musb_ep->type),
 			musb_ep->is_in ? "IN" : "OUT",
 			musb_ep->dma ? "dma, " : "",
 			musb_ep->packet_sz);