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authorGabor Juhos <juhosg@openwrt.org>2010-01-31 12:48:48 +0000
committerGabor Juhos <juhosg@openwrt.org>2010-01-31 12:48:48 +0000
commit8aceaf96be93a92cadbb1058fe065d04805b6af8 (patch)
tree4247d80133b7140f8c5d99cad94454a7a8bad093 /target/linux
parent21b06bd2c076c62d678efbf2288a2d4f12fe8aa6 (diff)
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ramips_eth: simplify tx_next computation
SVN-Revision: 19444
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/ramips/files/drivers/net/ramips.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/target/linux/ramips/files/drivers/net/ramips.c b/target/linux/ramips/files/drivers/net/ramips.c
index 3061bccc07..ed748de0d3 100644
--- a/target/linux/ramips/files/drivers/net/ramips.c
+++ b/target/linux/ramips/files/drivers/net/ramips.c
@@ -163,10 +163,7 @@ ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
dma_sync_single_for_device(NULL, mapped_addr, skb->len, DMA_TO_DEVICE);
spin_lock_irqsave(&priv->page_lock, flags);
tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
- if (tx == NUM_TX_DESC - 1)
- tx_next = 0;
- else
- tx_next = tx + 1;
+ tx_next = (tx + 1) % NUM_TX_DESC;
if ((priv->tx_skb[tx]) || (priv->tx_skb[tx_next]) ||
!(priv->tx[tx].txd2 & TX_DMA_DONE) ||
@@ -180,7 +177,7 @@ ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
dev->stats.tx_bytes += skb->len;
priv->tx_skb[tx] = skb;
wmb();
- ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0);
+ ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0);
spin_unlock_irqrestore(&priv->page_lock, flags);
return NETDEV_TX_OK;