From f73332fc39e35a6ac14f892390adcd34a63b00d3 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Thu, 21 Jun 2012 02:15:10 +0000 Subject: [PATCH] ixgbe: simplify padding and length checks The check for length <= 0 is bogus because length is unsigned, and network stack never sends zero length packets (unless it is totally broken). The check for really small packets can be optimized (using unlikely) and calling skb_pad directly. Signed-off-by: Stephen Hemminger Tested-by: Phil Schmitt Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index b0ddfd47e473..69a660b5621a 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -6380,17 +6380,12 @@ static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_ring *tx_ring; - if (skb->len <= 0) { - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; - } - /* * The minimum packet size for olinfo paylen is 17 so pad the skb * in order to meet this minimum size requirement. */ - if (skb->len < 17) { - if (skb_padto(skb, 17)) + if (unlikely(skb->len < 17)) { + if (skb_pad(skb, 17 - skb->len)) return NETDEV_TX_OK; skb->len = 17; }