[openwrt/openwrt] ar8216: reduce latency even further for ar8327 chips

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch master:
https://git.lede-project.org/cb7ac151cd13ca510588b80c24645f2add1b3737

commit cb7ac151cd13ca510588b80c24645f2add1b3737
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Sun Apr 8 09:27:09 2018 +0200

    ar8216: reduce latency even further for ar8327 chips
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 target/linux/generic/files/drivers/net/phy/ar8327.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/target/linux/generic/files/drivers/net/phy/ar8327.c b/target/linux/generic/files/drivers/net/phy/ar8327.c
index 96267d4..7bfc187 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8327.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8327.c
@@ -1083,8 +1083,10 @@ ar8327_wait_atu_ready(struct ar8xxx_priv *priv, u16 r2, u16 r1)
 {
 	int timeout = 20;
 
-	while (ar8xxx_mii_read32(priv, r2, r1) & AR8327_ATU_FUNC_BUSY && --timeout)
-                udelay(10);
+	while (ar8xxx_mii_read32(priv, r2, r1) & AR8327_ATU_FUNC_BUSY && --timeout) {
+		udelay(10);
+		cond_resched();
+	}
 
 	if (!timeout)
 		pr_err("ar8327: timeout waiting for atu to become ready\n");