From: Prashant Sreedharan Date: Mon, 13 Oct 2014 16:21:42 +0000 (-0700) Subject: tg3: Add skb->xmit_more support X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2c7c9ea429ba30fe506747b7da110e2212d8fefa;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git tg3: Add skb->xmit_more support Ring TX doorbell only if xmit_more is not set or the queue is stopped. Suggested-by: Daniel Borkmann Signed-off-by: Prashant Sreedharan Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index ba499489969a..dbb41c1923e6 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -8099,9 +8099,6 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) /* Sync BD data before updating mailbox */ wmb(); - /* Packets are ready, update Tx producer idx local and on card. */ - tw32_tx_mbox(tnapi->prodmbox, entry); - tnapi->tx_prod = entry; if (unlikely(tg3_tx_avail(tnapi) <= (MAX_SKB_FRAGS + 1))) { netif_tx_stop_queue(txq); @@ -8116,7 +8113,12 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) netif_tx_wake_queue(txq); } - mmiowb(); + if (!skb->xmit_more || netif_xmit_stopped(txq)) { + /* Packets are ready, update Tx producer idx on card. */ + tw32_tx_mbox(tnapi->prodmbox, entry); + mmiowb(); + } + return NETDEV_TX_OK; dma_error: