diff options
| author |   John Crispin <blogic@openwrt.org> | 2016-04-08 00:54:07 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-04-12 22:41:32 -0400 |
| commit | 13c822f6d468ca5a16da4d9432b067d54245c5b9 (patch) | |
| tree | 0d4bbd391612c1200c13f95a641afa2842f58968 /drivers/net/ethernet/mediatek | |
| parent | net: mediatek: remove superfluous reset call (diff) | |
| download | linux-dev-13c822f6d468ca5a16da4d9432b067d54245c5b9.tar.xz linux-dev-13c822f6d468ca5a16da4d9432b067d54245c5b9.zip | |
net: mediatek: fix stop and wakeup of queue
The driver supports 2 MACs. Both run on the same DMA ring. If we go
above/below the TX rings threshold value, we always need to wake/stop
the queue of both devices. Not doing to can cause TX stalls and packet
drops on one of the devices.
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mediatek')
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index a4982e497ea6..4ebc42e0271a 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -684,6 +684,28 @@ static inline int mtk_cal_txd_req(struct sk_buff *skb) return nfrags; } +static void mtk_wake_queue(struct mtk_eth *eth) +{ + int i; + + for (i = 0; i < MTK_MAC_COUNT; i++) { + if (!eth->netdev[i]) + continue; + netif_wake_queue(eth->netdev[i]); + } +} + +static void mtk_stop_queue(struct mtk_eth *eth) +{ + int i; + + for (i = 0; i < MTK_MAC_COUNT; i++) { + if (!eth->netdev[i]) + continue; + netif_stop_queue(eth->netdev[i]); + } +} + static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct mtk_mac *mac = netdev_priv(dev); @@ -695,7 +717,7 @@ static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) tx_num = mtk_cal_txd_req(skb); if (unlikely(atomic_read(&ring->free_count) <= tx_num)) { - netif_stop_queue(dev); + mtk_stop_queue(eth); netif_err(eth, tx_queued, dev, "Tx Ring full when queue awake!\n"); return NETDEV_TX_BUSY; @@ -720,10 +742,10 @@ static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) goto drop; if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) { - netif_stop_queue(dev); + mtk_stop_queue(eth); if (unlikely(atomic_read(&ring->free_count) > ring->thresh)) - netif_wake_queue(dev); + mtk_wake_queue(eth); } return NETDEV_TX_OK; @@ -897,13 +919,8 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again) if (!total) return 0; - for (i = 0; i < MTK_MAC_COUNT; i++) { - if (!eth->netdev[i] || - unlikely(!netif_queue_stopped(eth->netdev[i]))) - continue; - if (atomic_read(&ring->free_count) > ring->thresh) - netif_wake_queue(eth->netdev[i]); - } + if (atomic_read(&ring->free_count) > ring->thresh) + mtk_wake_queue(eth); return total; } |