aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/hamradio/bpqether.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/hamradio/bpqether.c')
-rw-r--r--drivers/net/hamradio/bpqether.c30
1 files changed, 12 insertions, 18 deletions
diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index abcd19a8bff..fe893c91a01 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -247,9 +247,8 @@ drop:
/*
* Send an AX.25 frame via an ethernet interface
*/
-static int bpq_xmit(struct sk_buff *skb, struct net_device *dev)
+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 int 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;
@@ -305,7 +299,7 @@ static int bpq_xmit(struct sk_buff *skb, struct net_device *dev)
dev_queue_xmit(skb);
netif_wake_queue(dev);
- return 0;
+ return NETDEV_TX_OK;
}
/*