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authorHerbert Xu <herbert@gondor.apana.org.au>2006-06-23 05:06:41 -0400
committerDavid S. Miller <davem@davemloft.net>2006-06-23 05:06:41 -0400
commit5b057c6b1a25d57edf2b4d1e956e50936480a9ff (patch)
treee641febd6f562e0ed1198c160ff353ab513f0612 /drivers/net/sk98lin
parent5fa21d821f6972e70942f2c555ec29dde962bdb2 (diff)
[NET]: Avoid allocating skb in skb_pad
First of all it is unnecessary to allocate a new skb in skb_pad since the existing one is not shared. More importantly, our hard_start_xmit interface does not allow a new skb to be allocated since that breaks requeueing. This patch uses pskb_expand_head to expand the existing skb and linearize it if needed. Actually, someone should sift through every instance of skb_pad on a non-linear skb as they do not fit the reasons why this was originally created. Incidentally, this fixes a minor bug when the skb is cloned (tcpdump, TCP, etc.). As it is skb_pad will simply write over a cloned skb. Because of the position of the write it is unlikely to cause problems but still it's best if we don't do it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/sk98lin')
-rw-r--r--drivers/net/sk98lin/skge.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/sk98lin/skge.c b/drivers/net/sk98lin/skge.c
index 38a26df4095f..f3efbd177ae7 100644
--- a/drivers/net/sk98lin/skge.c
+++ b/drivers/net/sk98lin/skge.c
@@ -1525,7 +1525,7 @@ struct sk_buff *pMessage) /* pointer to send-message */
1525 ** This is to resolve faulty padding by the HW with 0xaa bytes. 1525 ** This is to resolve faulty padding by the HW with 0xaa bytes.
1526 */ 1526 */
1527 if (BytesSend < C_LEN_ETHERNET_MINSIZE) { 1527 if (BytesSend < C_LEN_ETHERNET_MINSIZE) {
1528 if ((pMessage = skb_padto(pMessage, C_LEN_ETHERNET_MINSIZE)) == NULL) { 1528 if (skb_padto(pMessage, C_LEN_ETHERNET_MINSIZE)) {
1529 spin_unlock_irqrestore(&pTxPort->TxDesRingLock, Flags); 1529 spin_unlock_irqrestore(&pTxPort->TxDesRingLock, Flags);
1530 return 0; 1530 return 0;
1531 } 1531 }