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author | Felix Fietkau <nbd@nbd.name> | 2020-08-27 06:39:48 +0200 |
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committer | Felix Fietkau <nbd@nbd.name> | 2020-09-01 17:01:56 +0200 |
commit | b5d425af237dc03327078d6b9be178a38b5f8723 (patch) | |
tree | 42448318e13eef9ff603b01ebc3088a32ce617ec /target/linux/generic/pending-5.4/770-01-net-ethernet-mtk_eth_soc-significantly-reduce-mdio-b.patch | |
parent | 6541028598b4a1079ee6182c5b50d6bcd9e21002 (diff) | |
download | upstream-b5d425af237dc03327078d6b9be178a38b5f8723.tar.gz upstream-b5d425af237dc03327078d6b9be178a38b5f8723.tar.bz2 upstream-b5d425af237dc03327078d6b9be178a38b5f8723.zip |
mediatek/ramips: unify ethernet driver fixes and add performance optimizations
Increase DMA burst size and tx ring size and optimize tx processing
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'target/linux/generic/pending-5.4/770-01-net-ethernet-mtk_eth_soc-significantly-reduce-mdio-b.patch')
-rw-r--r-- | target/linux/generic/pending-5.4/770-01-net-ethernet-mtk_eth_soc-significantly-reduce-mdio-b.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.4/770-01-net-ethernet-mtk_eth_soc-significantly-reduce-mdio-b.patch b/target/linux/generic/pending-5.4/770-01-net-ethernet-mtk_eth_soc-significantly-reduce-mdio-b.patch new file mode 100644 index 0000000000..922c35a3e4 --- /dev/null +++ b/target/linux/generic/pending-5.4/770-01-net-ethernet-mtk_eth_soc-significantly-reduce-mdio-b.patch @@ -0,0 +1,26 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Mon, 8 Jun 2020 17:02:39 +0200 +Subject: [PATCH] net: ethernet: mtk_eth_soc: significantly reduce mdio bus + access latency + +usleep_range often ends up sleeping much longer than the 10-20us provided +as a range here. This causes significant latency in mdio bus acceses, +which easily adds multiple seconds to the boot time on MT7621 when polling +DSA slave ports. +Use cond_resched instead of usleep_range, since the MDIO access does not +take much time + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -85,7 +85,7 @@ static int mtk_mdio_busy_wait(struct mtk + return 0; + if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT)) + break; +- usleep_range(10, 20); ++ cond_resched(); + } + + dev_err(eth->dev, "mdio: MDIO timeout\n"); |