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authorEric Dumazet <edumazet@google.com>2012-06-12 23:58:16 +0000
committerDavid S. Miller <davem@davemloft.net>2012-06-17 16:28:32 -0700
commita7e2eaadd0edf6d71637c0d99aca404b0da8c1be (patch)
treefa4a711366c8e547e648c5e98ac89c5f1628ae19 /drivers/net/ethernet/nxp
parent79504d708d8be4131fbb115912521739c11db750 (diff)
downloadblackbird-op-linux-a7e2eaadd0edf6d71637c0d99aca404b0da8c1be.tar.gz
blackbird-op-linux-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.c11
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;
}
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