From ee93382886c822b4b0e6b794963994312aa0018e Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Tue, 29 Apr 2014 15:52:12 +0000 Subject: cns3xxx: ethernet - revert: clean up tx descs only when needed This reverts commit 0772ab938c0aedd7f4cc7127059d6ce8cf929dfa. Trying to optimize calls to eth_complete_tx in this fasion causes a regression where when sending only the tx queue can get disabled until a packet is received. This original call to eth_schedule_poll() is scheduled so it should not cause a performance issue. Signed-off-by: Tim Harvey git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40592 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) (limited to 'target/linux') diff --git a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c index 9692d47994..bbbbf5c091 100644 --- a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c +++ b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c @@ -583,7 +583,7 @@ static void eth_check_num_used(struct _tx_ring *tx_ring) } } -static int eth_complete_tx(struct sw *sw) +static void eth_complete_tx(struct sw *sw) { struct _tx_ring *tx_ring = &sw->tx_ring; struct tx_desc *desc; @@ -615,8 +615,6 @@ static int eth_complete_tx(struct sw *sw) tx_ring->free_index = index; tx_ring->num_used -= i; eth_check_num_used(tx_ring); - - return TX_DESCS - tx_ring->num_used; } static int eth_poll(struct napi_struct *napi, int budget) @@ -778,13 +776,11 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev) skb_walk_frags(skb, skb1) nr_desc++; + eth_schedule_poll(sw); spin_lock_bh(&tx_lock); if ((tx_ring->num_used + nr_desc + 1) >= TX_DESCS) { - /* clean up tx descriptors when needed */ - if (eth_complete_tx(sw) < nr_desc) { - spin_unlock_bh(&tx_lock); - return NETDEV_TX_BUSY; - } + spin_unlock_bh(&tx_lock); + return NETDEV_TX_BUSY; } index = index0 = tx_ring->cur_index; -- cgit v1.2.3