lgue(4): Fix an issue and do some cleanup.

In lgue_getmtu(), ced->wMaxSegmentSize was being referenced with ced
being either uninitialized or NULL.

While here, remove an unused variable and remove an extra 0 in the
USB_DEVICE().

diff --git a/sys/dev/netif/lgue/if_lgue.c b/sys/dev/netif/lgue/if_lgue.c
index 712ec0c..ccebe83 100644 (file)
--- a/sys/dev/netif/lgue/if_lgue.c
+++ b/sys/dev/netif/lgue/if_lgue.c
@@ -40,7 +40,7 @@
  * Supported device vendors/products
  */
 static struct usb_devno lgue_devs[] = {
-       { USB_DEVICE(0x01004, 0x61a2) } /* LG P500 */
+       { USB_DEVICE(0x1004, 0x61a2) }  /* LG P500 */
 };
 
 static int lgue_match(device_t);
@@ -302,15 +302,18 @@ lgue_getmtu(struct lgue_softc *sc)
        usb_interface_descriptor_t *id;
 
        id = usbd_get_interface_descriptor(sc->lgue_ctl_iface);
-       if (id == NULL) goto bad;
+       if (id == NULL) {
+               kprintf("usbd_get_interface_descriptor() returned NULL\n");
+               return(ETHERMTU);
+       }
+
        ced = (const usb_cdc_ethernet_descriptor_t *)usb_find_desc_if(sc->lgue_udev,
            UDESC_CS_INTERFACE, UDESCSUB_CDC_ETHERNET, id);
-       if (ced == NULL)
-               goto bad;
+       if (ced == NULL) {
+               kprintf("usb_find_desc_if() returned NULL\n");
+               return(ETHERMTU);
+       }
        return(UGETW(ced->wMaxSegmentSize));
-bad:
-       kprintf("Bad mtu:%d\n", UGETW(ced->wMaxSegmentSize));
-       return(ETHERMTU);
 }
 
 /*
@@ -882,9 +885,6 @@ lgue_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
 static void
 lgue_watchdog(struct ifnet *ifp)
 {
-       struct lgue_softc *sc;
-
-       sc = ifp->if_softc;
        ifp->if_oerrors++;
 
        if (!ifq_is_empty(&ifp->if_snd))