batman-adv: Remove dev_queue_xmit return code exception

No caller of batadv_send_skb_to_orig is expecting the results to be -1
(-EPERM) anymore when the skbuff was not consumed. They will instead expect
that the skbuff is always consumed. Having such return code filter is
therefore not needed anymore.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index b00aac74370c738700d193c54e62730ab83991cd..9ea272ef661276731e1b9a0d8c062bf5726a4031 100644 (file)
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -64,8 +64,11 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work);
  * If neigh_node is NULL, then the packet is broadcasted using hard_iface,
  * otherwise it is sent as unicast to the given neighbor.
  *
- * Return: NET_TX_DROP in case of error or the result of dev_queue_xmit(skb)
- * otherwise
+ * Regardless of the return value, the skb is consumed.
+ *
+ * Return: A negative errno code is returned on a failure. A success does not
+ * guarantee the frame will be transmitted as it may be dropped due
+ * to congestion or traffic shaping.
  */
 int batadv_send_skb_packet(struct sk_buff *skb,
                           struct batadv_hard_iface *hard_iface,
@@ -73,7 +76,6 @@ int batadv_send_skb_packet(struct sk_buff *skb,
 {
        struct batadv_priv *bat_priv;
        struct ethhdr *ethhdr;
-       int ret;
 
        bat_priv = netdev_priv(hard_iface->soft_iface);
 
@@ -111,15 +113,8 @@ int batadv_send_skb_packet(struct sk_buff *skb,
        /* dev_queue_xmit() returns a negative result on error.  However on
         * congestion and traffic shaping, it drops and returns NET_XMIT_DROP
         * (which is > 0). This will not be treated as an error.
-        *
-        * a negative value cannot be returned because it could be interepreted
-        * as not consumed skb by callers of batadv_send_skb_to_orig.
         */
-       ret = dev_queue_xmit(skb);
-       if (ret < 0)
-               ret = NET_XMIT_DROP;
-
-       return ret;
+       return dev_queue_xmit(skb);
 send_skb_err:
        kfree_skb(skb);
        return NET_XMIT_DROP;