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authorFelix Fietkau <nbd@nbd.name>2018-04-07 13:02:08 +0200
committerFelix Fietkau <nbd@nbd.name>2018-04-08 09:14:23 +0200
commit17a955d4d7ea36ee41e025d61e600ee143f58b97 (patch)
tree15fef93ed42ed4502db5b493e088f3a78c6a71b7 /target/linux/generic/files
parenteda27d755729b65e3620e60dc0340a39b0d9e0f1 (diff)
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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 <nbd@nbd.name>
Diffstat (limited to 'target/linux/generic/files')
-rw-r--r--target/linux/generic/files/drivers/net/phy/ar8216.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c
index 6181137..7512ee1 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");