diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0069-net-mediatek-fix-stop-and-wakeup-of-queue.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.4/0069-net-mediatek-fix-stop-and-wakeup-of-queue.patch | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0069-net-mediatek-fix-stop-and-wakeup-of-queue.patch b/target/linux/mediatek/patches-4.4/0069-net-mediatek-fix-stop-and-wakeup-of-queue.patch new file mode 100644 index 0000000000..170266227c --- /dev/null +++ b/target/linux/mediatek/patches-4.4/0069-net-mediatek-fix-stop-and-wakeup-of-queue.patch @@ -0,0 +1,89 @@ +From 6f8bfdfe2984467177d2a88982517659ec09ab5d Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Tue, 29 Mar 2016 16:41:07 +0200 +Subject: [PATCH 69/78] 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 thershold value, we always need to wake/stop +the queu 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> +--- + drivers/net/ethernet/mediatek/mtk_eth_soc.c | 37 +++++++++++++++++++-------- + 1 file 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 293ea59..04bdb9d 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; + } +-- +1.7.10.4 + |