From: Vivien Didelot <vivien.didelot@gmail.com>
Date: Fri, 9 Aug 2019 22:47:59 +0000 (-0400)
Subject: net: dsa: mv88e6xxx: add delay in direct SMI wait
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=eede236112b7ea4d9a7c2f2af2ac6648699b88f3;p=linux.git

net: dsa: mv88e6xxx: add delay in direct SMI wait

The mv88e6xxx_smi_direct_wait routine is used to wait on indirect
registers access. It is of no exception and must delay between read
attempts, like other wait routines.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/dsa/mv88e6xxx/smi.c b/drivers/net/dsa/mv88e6xxx/smi.c
index 18e87a5a20a35..282fe08db0505 100644
--- a/drivers/net/dsa/mv88e6xxx/smi.c
+++ b/drivers/net/dsa/mv88e6xxx/smi.c
@@ -66,6 +66,8 @@ static int mv88e6xxx_smi_direct_wait(struct mv88e6xxx_chip *chip,
 
 		if (!!(data & BIT(bit)) == !!val)
 			return 0;
+
+		usleep_range(1000, 2000);
 	}
 
 	return -ETIMEDOUT;