Merge pull request #6844 from gebart/pr/scan-build-fixes

net: Fix two minor return value issues

drivers/at86rf2xx/at86rf2xx_netdev.c

@@ -304,7 +304,6 @@ static int _get(netdev_t *netdev, netopt_t opt, void *val, size_t max_len)
     }
 
     uint8_t old_state = at86rf2xx_get_status(dev);
-    res = 0;
 
     /* temporarily wake up if sleeping */
     if (old_state == AT86RF2XX_STATE_SLEEP) {
@@ -339,6 +338,7 @@ static int _get(netdev_t *netdev, netopt_t opt, void *val, size_t max_len)
 
         default:
             res = -ENOTSUP;
+            break;
     }
 
     /* go back to sleep if were sleeping */

drivers/netdev_ieee802154/netdev_ieee802154.c

@@ -165,6 +165,7 @@ int netdev_ieee802154_set(netdev_ieee802154_t *dev, netopt_t opt, void *value,
         case NETOPT_ADDR_LEN:
         case NETOPT_SRC_LEN:
             assert(len == sizeof(uint16_t));
+            res = sizeof(uint16_t);
             switch ((*(uint16_t *)value)) {
                 case IEEE802154_SHORT_ADDRESS_LEN:
                     dev->flags &= ~NETDEV_IEEE802154_SRC_MODE_LONG;
@@ -176,7 +177,6 @@ int netdev_ieee802154_set(netdev_ieee802154_t *dev, netopt_t opt, void *value,
                     res = -EAFNOSUPPORT;
                     break;
             }
-            res = sizeof(uint16_t);
             break;
         case NETOPT_NID:
             assert(len == sizeof(dev->pan));