diff options
| author | Eric Dumazet <edumazet@google.com> | 2012-06-12 23:58:16 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-06-17 16:28:32 -0700 |
| commit | a7e2eaadd0edf6d71637c0d99aca404b0da8c1be (patch) | |
| tree | fa4a711366c8e547e648c5e98ac89c5f1628ae19 /drivers/net/ethernet/nxp | |
| parent | 79504d708d8be4131fbb115912521739c11db750 (diff) | |
| download | lwn-a7e2eaadd0edf6d71637c0d99aca404b0da8c1be.tar.gz lwn-a7e2eaadd0edf6d71637c0d99aca404b0da8c1be.zip | |
net: lpc_eth: free skbs in start_xmit
Transmitted skbs can be freed immediately in lpc_eth_hard_start_xmit()
instead of at TX completion, since driver copies the frames in DMA area.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/nxp')
| -rw-r--r-- | drivers/net/ethernet/nxp/lpc_eth.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c index 083d6715335c..028dde4d4979 100644 --- a/drivers/net/ethernet/nxp/lpc_eth.c +++ b/drivers/net/ethernet/nxp/lpc_eth.c @@ -440,7 +440,7 @@ struct netdata_local { spinlock_t lock; void __iomem *net_base; u32 msg_enable; - struct sk_buff *skb[ENET_TX_DESC]; + unsigned int skblen[ENET_TX_DESC]; unsigned int last_tx_idx; unsigned int num_used_tx_buffs; struct mii_bus *mii_bus; @@ -903,12 +903,11 @@ err_out: static void __lpc_handle_xmit(struct net_device *ndev) { struct netdata_local *pldat = netdev_priv(ndev); - struct sk_buff *skb; u32 txcidx, *ptxstat, txstat; txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base)); while (pldat->last_tx_idx != txcidx) { - skb = pldat->skb[pldat->last_tx_idx]; + unsigned int skblen = pldat->skblen[pldat->last_tx_idx]; /* A buffer is available, get buffer status */ ptxstat = &pldat->tx_stat_v[pldat->last_tx_idx]; @@ -945,9 +944,8 @@ static void __lpc_handle_xmit(struct net_device *ndev) } else { /* Update stats */ ndev->stats.tx_packets++; - ndev->stats.tx_bytes += skb->len; + ndev->stats.tx_bytes += skblen; } - dev_kfree_skb_irq(skb); txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base)); } @@ -1132,7 +1130,7 @@ static int lpc_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) memcpy(pldat->tx_buff_v + txidx * ENET_MAXF_SIZE, skb->data, len); /* Save the buffer and increment the buffer counter */ - pldat->skb[txidx] = skb; + pldat->skblen[txidx] = len; pldat->num_used_tx_buffs++; /* Start transmit */ @@ -1147,6 +1145,7 @@ static int lpc_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) spin_unlock_irq(&pldat->lock); + dev_kfree_skb(skb); return NETDEV_TX_OK; } |