diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0092-net-next-mediatek-remove-superfluous-queue-wake-up-c.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.4/0092-net-next-mediatek-remove-superfluous-queue-wake-up-c.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0092-net-next-mediatek-remove-superfluous-queue-wake-up-c.patch b/target/linux/mediatek/patches-4.4/0092-net-next-mediatek-remove-superfluous-queue-wake-up-c.patch new file mode 100644 index 0000000..c330da9 --- /dev/null +++ b/target/linux/mediatek/patches-4.4/0092-net-next-mediatek-remove-superfluous-queue-wake-up-c.patch @@ -0,0 +1,41 @@ +From 538020913db04d199ce4d7e845444880e8200b5f Mon Sep 17 00:00:00 2001 +From: John Crispin <john@phrozen.org> +Date: Tue, 3 May 2016 05:40:38 +0200 +Subject: [PATCH 092/102] net-next: mediatek: remove superfluous queue wake up + call + +The code checks if the queue should be stopped because we are below the +threshold of free descriptors only to check if it should be started again. +If we do end up in a state where we are at the threshold limit, it makes +more sense to just stop the queue and wait for the next IRQ to trigger the +TX housekeeping again. There is no rush in enqueuing the next packet, it +needs to wait for all the others in the queue to be dispatched first +anyway. + +Signed-off-by: John Crispin <john@phrozen.org> +--- + drivers/net/ethernet/mediatek/mtk_eth_soc.c | 7 ++----- + 1 file changed, 2 insertions(+), 5 deletions(-) + +diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +index 9da533e..a569c32 100644 +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -795,12 +795,9 @@ static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) + if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0) + goto drop; + +- if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) { ++ if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) + mtk_stop_queue(eth); +- if (unlikely(atomic_read(&ring->free_count) > +- ring->thresh)) +- mtk_wake_queue(eth); +- } ++ + spin_unlock_irqrestore(ð->page_lock, flags); + + return NETDEV_TX_OK; +-- +1.7.10.4 + |