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-rw-r--r--target/linux/mediatek/patches-4.4/0091-net-next-mediatek-only-wake-the-queue-if-it-is-stopp.patch53
1 files changed, 53 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0091-net-next-mediatek-only-wake-the-queue-if-it-is-stopp.patch b/target/linux/mediatek/patches-4.4/0091-net-next-mediatek-only-wake-the-queue-if-it-is-stopp.patch
new file mode 100644
index 0000000000..c292ff9794
--- /dev/null
+++ b/target/linux/mediatek/patches-4.4/0091-net-next-mediatek-only-wake-the-queue-if-it-is-stopp.patch
@@ -0,0 +1,53 @@
+From 1473b4cce85760c0202a08e6a48ec51867dc1bf7 Mon Sep 17 00:00:00 2001
+From: John Crispin <john@phrozen.org>
+Date: Tue, 3 May 2016 04:01:38 +0200
+Subject: [PATCH 091/102] net-next: mediatek: only wake the queue if it is
+ stopped
+
+The current code unconditionally wakes up the queue at the end of each
+tx_poll action. Change the code to only wake up the queues if any of
+them have actually been stopped before.
+
+Signed-off-by: John Crispin <john@phrozen.org>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 17 ++++++++++++++++-
+ 1 file changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+index 87b48c0..9da533e 100644
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -716,6 +716,20 @@ static inline int mtk_cal_txd_req(struct sk_buff *skb)
+ return nfrags;
+ }
+
++static int mtk_queue_stopped(struct mtk_eth *eth)
++{
++ int i;
++
++ for (i = 0; i < MTK_MAC_COUNT; i++) {
++ if (!eth->netdev[i])
++ continue;
++ if (netif_queue_stopped(eth->netdev[i]))
++ return 1;
++ }
++
++ return 0;
++}
++
+ static void mtk_wake_queue(struct mtk_eth *eth)
+ {
+ int i;
+@@ -960,7 +974,8 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
+ if (!total)
+ return 0;
+
+- if (atomic_read(&ring->free_count) > ring->thresh)
++ if (mtk_queue_stopped(eth) &&
++ (atomic_read(&ring->free_count) > ring->thresh))
+ mtk_wake_queue(eth);
+
+ return total;
+--
+1.7.10.4
+