Bluetooth: 6lowpan: Return EAGAIN error also for multicast packets

Make sure that we are able to return EAGAIN from l2cap_chan_send()
even for multicast packets. The error code was ignored unncessarily.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

1 files changed, 5 insertions, 11 deletions

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 44eaad77e70c..fcfaa7006b28 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -509,21 +509,16 @@ static int header_create(struct sk_buff *skb, struct net_device *netdev,
 
 /* Packet to BT LE device */
 static int send_pkt(struct l2cap_chan *chan, struct sk_buff *skb,
-                    struct net_device *netdev, bool is_mcast)
+                    struct net_device *netdev)
 {
         struct msghdr msg;
         struct kvec iv;
         int err;
 
         /* Remember the skb so that we can send EAGAIN to the caller if
-         * we run out of credits. This is not done for multicast packets
-         * because we generate mcast packet in this module and are not
-         * really able to remember the skb after this packet is sent.
+         * we run out of credits.
          */
-        if (is_mcast)
-                chan->data = NULL;
-        else
-                chan->data = skb;
+        chan->data = skb;
 
         memset(&msg, 0, sizeof(msg));
         msg.msg_iov = (struct iovec *) &iv;
@@ -575,7 +570,7 @@ static void send_mcast_pkt(struct sk_buff *skb, struct net_device *netdev)
                                netdev->name,
                                &pentry->chan->dst, pentry->chan->dst_type,
                                &pentry->peer_addr, pentry->chan);
-                        send_pkt(pentry->chan, local_skb, netdev, true);
+                        send_pkt(pentry->chan, local_skb, netdev);
 
                         kfree_skb(local_skb);
                 }
@@ -617,8 +612,7 @@ static netdev_tx_t bt_xmit(struct sk_buff *skb, struct net_device *netdev)
                         BT_DBG("xmit %s to %pMR type %d IP %pI6c chan %p",
                                netdev->name, &addr, addr_type,
                                &lowpan_cb(skb)->addr, lowpan_cb(skb)->chan);
-                        err = send_pkt(lowpan_cb(skb)->chan, skb, netdev,
-                                       false);
+                        err = send_pkt(lowpan_cb(skb)->chan, skb, netdev);
                 } else {
                         err = -ENOENT;
                 }