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ar8216: reduce latency by inserting scheduling points into code hogging the CPU

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Should reduce network related latency caused by accessing MIB counters

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2018-04-07 13:02:08 +02:00
parent eda27d7557
commit 17a955d4d7
1 changed files with 7 additions and 2 deletions
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7
target/linux/generic/files/drivers/net/phy/ar8216.c
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@@ -355,6 +355,7 @@ ar8xxx_reg_wait(struct ar8xxx_priv *priv, u32 reg, u32 mask, u32 val,
return 0; return 0;
usleep_range(1000, 2000); usleep_range(1000, 2000);
cond_resched();
} }
return -ETIMEDOUT; return -ETIMEDOUT;
@@ -426,6 +427,7 @@ ar8xxx_mib_fetch_port_stat(struct ar8xxx_priv *priv, int port, bool flush)
mib_stats[i] = 0; mib_stats[i] = 0;
else else
mib_stats[i] += t; mib_stats[i] += t;
cond_resched();
} }
} }
@@ -565,6 +567,7 @@ ar8216_wait_bit(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
break; break;
udelay(10); udelay(10);
cond_resched();
} }
pr_err("ar8216: timeout on reg %08x: %08x & %08x != %08x\n", 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; int timeout = 20;
while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout) while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout) {
udelay(10); udelay(10);
cond_resched();
}
if (!timeout) if (!timeout)
pr_err("ar8216: timeout waiting for atu to become ready\n"); pr_err("ar8216: timeout waiting for atu to become ready\n");