checking unsupported usb function combination.

Change-Id: Iaa88182ddc6e4b7de7fee606fb6deb86252932ea

diff --git a/hw/usb_gadget/usb_gadget.c b/hw/usb_gadget/usb_gadget.c
index 0bcb10b..fcf144c 100644 (file)
--- a/hw/usb_gadget/usb_gadget.c
+++ b/hw/usb_gadget/usb_gadget.c
@@ -185,7 +185,7 @@ static int simple_id_to_gadget(struct usb_gadget_id *gadget_id,
                               struct usb_gadget **_gadget)
 {
        struct usb_gadget *gadget;
-       int n_configs;
+       int n_configs = 0;
        /* zero terminates */
        int functions[2][sizeof(gadget_id->function_mask)*8];
        int n_functions;
@@ -285,7 +285,7 @@ static int simple_id_to_gadget(struct usb_gadget_id *gadget_id,
                break;
        };
 
-       if (n_configs > 2) {
+       if (n_configs > 2 || n_configs <= 0) {
                ret = -EINVAL;
                goto free_gadget;
        }