diff options
| author | David Daney <ddaney@caviumnetworks.com> | 2010-05-05 15:03:12 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-06 06:22:35 +0200 |
| commit | 4e4a4f1478fdb303c9d99c69cfb4e973526f0c99 (patch) | |
| tree | a5b6a62d6743b1df1074e01d35b054471a688b6a /drivers/net | |
| parent | netdev: octeon_mgmt: Free TX skbufs in a timely manner. (diff) | |
| download | linux-4e4a4f1478fdb303c9d99c69cfb4e973526f0c99.tar.xz linux-4e4a4f1478fdb303c9d99c69cfb4e973526f0c99.zip | |
netdev: octeon_mgmt: Try not to drop TX packets when stopping the queue.
Stop the queue when we add the packet that will fill it instead of dropping the packet
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/octeon/octeon_mgmt.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/net/octeon/octeon_mgmt.c b/drivers/net/octeon/octeon_mgmt.c index 3cf6f62502c8..1fdc7b303a6b 100644 --- a/drivers/net/octeon/octeon_mgmt.c +++ b/drivers/net/octeon/octeon_mgmt.c @@ -955,6 +955,7 @@ static int octeon_mgmt_xmit(struct sk_buff *skb, struct net_device *netdev) int port = p->port; union mgmt_port_ring_entry re; unsigned long flags; + int rv = NETDEV_TX_BUSY; re.d64 = 0; re.s.len = skb->len; @@ -964,15 +965,18 @@ static int octeon_mgmt_xmit(struct sk_buff *skb, struct net_device *netdev) spin_lock_irqsave(&p->tx_list.lock, flags); + if (unlikely(p->tx_current_fill >= ring_max_fill(OCTEON_MGMT_TX_RING_SIZE) - 1)) { + spin_unlock_irqrestore(&p->tx_list.lock, flags); + netif_stop_queue(netdev); + spin_lock_irqsave(&p->tx_list.lock, flags); + } + if (unlikely(p->tx_current_fill >= ring_max_fill(OCTEON_MGMT_TX_RING_SIZE))) { spin_unlock_irqrestore(&p->tx_list.lock, flags); - dma_unmap_single(p->dev, re.s.addr, re.s.len, DMA_TO_DEVICE); - - netif_stop_queue(netdev); - return NETDEV_TX_BUSY; + goto out; } __skb_queue_tail(&p->tx_list, skb); @@ -995,8 +999,10 @@ static int octeon_mgmt_xmit(struct sk_buff *skb, struct net_device *netdev) cvmx_write_csr(CVMX_MIXX_ORING2(port), 1); netdev->trans_start = jiffies; + rv = NETDEV_TX_OK; +out: octeon_mgmt_update_tx_stats(netdev); - return NETDEV_TX_OK; + return rv; } #ifdef CONFIG_NET_POLL_CONTROLLER |