[net-next 05/14] igb: Correcting and improving small packet check and padding
flat view
STALE5121d
REVIEWED: 1 (0M)
From: Jeff Kirsher <hidden>
Date: 2012-10-19 11:45:43
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Status: Reviewed.
1 review trailer.
From: Tushar Dave <redacted> Current implementation mess up the tail pointer. This patch sets skb->tail correctly. Also, the small packet check and padding is optimized by using unlikely and calling skb_pad directly. Signed-off-by: Tushar Dave <redacted> Tested-by: Jeff Pieper <redacted> Signed-off-by: Jeff Kirsher <redacted> --- drivers/net/ethernet/intel/igb/igb_main.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index e1ceb37..c611cff 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c@@ -4467,10 +4467,11 @@ static netdev_tx_t igb_xmit_frame(struct sk_buff *skb, * The minimum packet size with TCTL.PSP set 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; + skb_set_tail_pointer(skb, 17); } return igb_xmit_frame_ring(skb, igb_tx_queue_mapping(adapter, skb));
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1.7.11.7