[PATCH] usb root hub strings

Someone changed the "get string" logic to use short reads,
not long ones, a while back.  That broke many root hub
string accesses (not through tools like "lsusb"!) because
that logic didn't handle short reads quite right.

drivers/usb/core/hcd.c

@@ -310,9 +310,9 @@ static int rh_string (
 	} else
 	    return 0;
 
-	data [0] = 2 + ascii2utf (buf, data + 2, len - 2);
+	data [0] = 2 * (strlen (buf) + 1);
 	data [1] = 3;	/* type == string */
-	return data [0];
+	return 2 + ascii2utf (buf, data + 2, len - 2);
 }