Revert "usb_storage : scan all interfaces to find a storage device"

This reverts commit cd749658d5.

The conflicts with this commit are hard for me to figure out. I will re-apply
it later.

common/usb_storage.c

@@ -168,30 +168,6 @@ static unsigned int usb_get_max_lun(struct us_data *us)
 	return (len > 0) ? *result : 0;
 }
 
-static int usb_storage_register(struct usb_device *dev, unsigned char iface)
-{
-	int lun, max_lun, start = usb_max_devs;
-	int nb_dev = 0;
-
-	if (!usb_storage_probe(dev, iface, &usb_stor[usb_max_devs]))
-		return nb_dev;
-
-	/*
-	 * OK, it's a storage device.  Iterate over its LUNs
-	 * and populate `usb_dev_desc'.
-	 */
-	max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
-	for (lun = 0; lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV; lun++) {
-		usb_dev_desc[usb_max_devs].lun = lun;
-		if (usb_stor_get_info(dev, &usb_stor[start],
-		    &usb_dev_desc[usb_max_devs]) == 1) {
-			nb_dev++;
-		}
-	}
-
-	return nb_dev;
-}
-
 /*******************************************************************************
  * scan the usb and reports device info
  * to the user if mode = 1
@@ -199,7 +175,7 @@ static int usb_storage_register(struct usb_device *dev, unsigned char iface)
  */
 int usb_stor_scan(int mode)
 {
-	unsigned char i, iface;
+	unsigned char i;
 	struct usb_device *dev;
 
 	if (mode == 1)
@@ -225,10 +201,23 @@ int usb_stor_scan(int mode)
 		if (dev == NULL)
 			break; /* no more devices available */
 
-		for (iface = 0; iface < dev->config.no_of_if; iface++) {
-			usb_max_devs += usb_storage_register(dev, iface);
+		if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
+			/* OK, it's a storage device.  Iterate over its LUNs
+			 * and populate `usb_dev_desc'.
+			 */
+			int lun, max_lun, start = usb_max_devs;
+
+			max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
+			for (lun = 0;
+			     lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
+			     lun++) {
+				usb_dev_desc[usb_max_devs].lun = lun;
+				if (usb_stor_get_info(dev, &usb_stor[start],
+				    &usb_dev_desc[usb_max_devs]) == 1) {
+					usb_max_devs++;
+				}
+			}
 		}
-
 		/* if storage device */
 		if (usb_max_devs == USB_MAX_STOR_DEV) {
 			printf("max USB Storage Device reached: %d stopping\n",