libusbgx: Fix gadget-acm-ecm example to cleanup at exit.

Make use of previously unused variable ret to cleanup
after successful gadget creation.

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
[Port from libusbg and update description]
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>

diff --git a/examples/gadget-acm-ecm.c b/examples/gadget-acm-ecm.c
index 45d8eff..e84c300 100644 (file)
--- a/examples/gadget-acm-ecm.c
+++ b/examples/gadget-acm-ecm.c
@@ -39,13 +39,13 @@ int main(void)
        s = usbg_init("/sys/kernel/config");
        if (!s) {
                fprintf(stderr, "Error on USB gadget init\n");
-               goto error1;
+               goto out1;
        }
 
        g = usbg_create_gadget(s, "g1", VENDOR, PRODUCT);
        if (!g) {
                fprintf(stderr, "Error on create gadget\n");
-               goto error2;
+               goto out2;
        }
        usbg_set_gadget_serial_number(g, LANG_US_ENG, "0123456789");
        usbg_set_gadget_manufacturer(g, LANG_US_ENG, "Foo Inc.");
@@ -54,25 +54,25 @@ int main(void)
        f_acm0 = usbg_create_function(g, F_ACM, "usb0");
        if (!f_acm0) {
                fprintf(stderr, "Error creating acm0 function\n");
-               goto error2;
+               goto out2;
        }
 
        f_acm1 = usbg_create_function(g, F_ACM, "usb1");
        if (!f_acm1) {
                fprintf(stderr, "Error creating acm1 function\n");
-               goto error2;
+               goto out2;
        }
 
        f_ecm = usbg_create_function(g, F_ECM, "usb0");
        if (!f_ecm) {
                fprintf(stderr, "Error creating ecm function\n");
-               goto error2;
+               goto out2;
        }
 
        c = usbg_create_config(g, "c.1");
        if (!c) {
                fprintf(stderr, "Error creating config\n");
-               goto error2;
+               goto out2;
        }
        usbg_set_config_string(c, LANG_US_ENG, "CDC 2xACM+ECM");
        usbg_add_config_function(c, "acm.GS0", f_acm0);
@@ -81,11 +81,11 @@ int main(void)
 
        usbg_enable_gadget(g, DEFAULT_UDC);
 
-       return 0;
+       ret = 0;
 
-error2:
+out2:
        usbg_cleanup(s);
 
-error1:
-       return -EINVAL;
+out1:
+       return ret;
 }