diff options
Diffstat (limited to 'drivers/net/hamradio/bpqether.c')
| -rw-r--r-- | drivers/net/hamradio/bpqether.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c index 3c7cc7f45800..fe893c91a01b 100644 --- a/drivers/net/hamradio/bpqether.c +++ b/drivers/net/hamradio/bpqether.c @@ -249,7 +249,6 @@ drop: */ static netdev_tx_t bpq_xmit(struct sk_buff *skb, struct net_device *dev) { - struct sk_buff *newskb; unsigned char *ptr; struct bpqdev *bpq; int size; @@ -263,28 +262,23 @@ static netdev_tx_t bpq_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; } - skb_pull(skb, 1); + skb_pull(skb, 1); /* Drop KISS byte */ size = skb->len; /* - * The AX.25 code leaves enough room for the ethernet header, but - * sendto() does not. + * We're about to mess with the skb which may still shared with the + * generic networking code so unshare and ensure it's got enough + * space for the BPQ headers. */ - if (skb_headroom(skb) < AX25_BPQ_HEADER_LEN) { /* Ough! */ - if ((newskb = skb_realloc_headroom(skb, AX25_BPQ_HEADER_LEN)) == NULL) { - printk(KERN_WARNING "bpqether: out of memory\n"); - kfree_skb(skb); - return NETDEV_TX_OK; - } - - if (skb->sk != NULL) - skb_set_owner_w(newskb, skb->sk); - + if (skb_cow(skb, AX25_BPQ_HEADER_LEN)) { + if (net_ratelimit()) + pr_err("bpqether: out of memory\n"); kfree_skb(skb); - skb = newskb; + + return NETDEV_TX_OK; } - ptr = skb_push(skb, 2); + ptr = skb_push(skb, 2); /* Make space for length */ *ptr++ = (size + 5) % 256; *ptr++ = (size + 5) / 256; |