diff options
| author |   Felix Fietkau <nbd@nbd.name> | 2021-04-22 22:20:58 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-04-23 13:31:58 -0700 |
| commit | 3630d519d7c3eab92567658690e44ffe0517d109 (patch) | |
| tree | 1d7014b129e5cdbd09ec5c37551a24fefec9bea9 /drivers/net/ethernet/mediatek | |
| parent | net: ethernet: mtk_eth_soc: use napi_consume_skb (diff) | |
| download | linux-dev-3630d519d7c3eab92567658690e44ffe0517d109.tar.xz linux-dev-3630d519d7c3eab92567658690e44ffe0517d109.zip | |
net: ethernet: mtk_eth_soc: 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>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index 5cf64de3ddf8..d992d4f1f400 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -86,7 +86,7 @@ static int mtk_mdio_busy_wait(struct mtk_eth *eth) 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"); |