From 3f2aadd041a7a3e732d182c3770b3fa95a2300b2 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Mon, 12 Sep 2005 14:21:48 -0700 Subject: [PATCH] [NETROM]: Fix rebuild header mess For reason that probably nobody recalls NET/ROM does it's actual packet transmission in nr_rebuild_header and even treats invocation of it's hard_start_xmit method nr_xmit as a bug. Fix that by splitting the job done by nr_rebuild_header into two halves. Along with that we now also can get rid of the silly clone of the skb on transmit. Signed-off-by: Ralf Baechle DL5RB Signed-off-by: David S. Miller --- net/netrom/nr_dev.c | 44 +++++++++++++++----------------------------- 1 file changed, 15 insertions(+), 29 deletions(-) diff --git a/net/netrom/nr_dev.c b/net/netrom/nr_dev.c index 263da4c2649..431a2538442 100644 --- a/net/netrom/nr_dev.c +++ b/net/netrom/nr_dev.c @@ -71,15 +71,10 @@ int nr_rx_ip(struct sk_buff *skb, struct net_device *dev) static int nr_rebuild_header(struct sk_buff *skb) { - struct net_device *dev = skb->dev; - struct net_device_stats *stats = netdev_priv(dev); - struct sk_buff *skbn; unsigned char *bp = skb->data; - int len; - if (arp_find(bp + 7, skb)) { + if (arp_find(bp + 7, skb)) return 1; - } bp[6] &= ~AX25_CBIT; bp[6] &= ~AX25_EBIT; @@ -90,27 +85,7 @@ static int nr_rebuild_header(struct sk_buff *skb) bp[6] |= AX25_EBIT; bp[6] |= AX25_SSSID_SPARE; - if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) { - kfree_skb(skb); - return 1; - } - - if (skb->sk != NULL) - skb_set_owner_w(skbn, skb->sk); - - kfree_skb(skb); - - len = skbn->len; - - if (!nr_route_frame(skbn, NULL)) { - kfree_skb(skbn); - stats->tx_errors++; - } - - stats->tx_packets++; - stats->tx_bytes += len; - - return 1; + return 0; } #else @@ -186,8 +161,19 @@ static int nr_close(struct net_device *dev) static int nr_xmit(struct sk_buff *skb, struct net_device *dev) { struct net_device_stats *stats = netdev_priv(dev); - dev_kfree_skb(skb); - stats->tx_errors++; + unsigned int len; + + len = skb->len; + + if (!nr_route_frame(skb, NULL)) { + kfree_skb(skb); + stats->tx_errors++; + return 0; + } + + stats->tx_packets++; + stats->tx_bytes += len; + return 0; } -- 2.20.1