From 17a955d4d7ea36ee41e025d61e600ee143f58b97 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 7 Apr 2018 13:02:08 +0200 Subject: ar8216: reduce latency by inserting scheduling points into code hogging the CPU Should reduce network related latency caused by accessing MIB counters Signed-off-by: Felix Fietkau --- target/linux/generic/files/drivers/net/phy/ar8216.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'target') diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c index 61811370de..7512ee1b43 100644 --- a/target/linux/generic/files/drivers/net/phy/ar8216.c +++ b/target/linux/generic/files/drivers/net/phy/ar8216.c @@ -355,6 +355,7 @@ ar8xxx_reg_wait(struct ar8xxx_priv *priv, u32 reg, u32 mask, u32 val, return 0; usleep_range(1000, 2000); + cond_resched(); } return -ETIMEDOUT; @@ -426,6 +427,7 @@ ar8xxx_mib_fetch_port_stat(struct ar8xxx_priv *priv, int port, bool flush) mib_stats[i] = 0; else mib_stats[i] += t; + cond_resched(); } } @@ -565,6 +567,7 @@ ar8216_wait_bit(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val) break; udelay(10); + cond_resched(); } pr_err("ar8216: timeout on reg %08x: %08x & %08x != %08x\n", @@ -730,8 +733,10 @@ ar8216_wait_atu_ready(struct ar8xxx_priv *priv, u16 r2, u16 r1) { int timeout = 20; - while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout) - udelay(10); + while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout) { + udelay(10); + cond_resched(); + } if (!timeout) pr_err("ar8216: timeout waiting for atu to become ready\n"); -- cgit v1.2.3