From d235c48b40d399328585a68f3f9bf7cc3062d586 Mon Sep 17 00:00:00 2001
From: Maxime Chevallier <maxime.chevallier@bootlin.com>
Date: Thu, 28 Feb 2019 22:14:33 +0100
Subject: [PATCH] net: dsa: mv88e6xxx: power serdes on/off for 10G interfaces
on 6390X
Upon setting the cmode on 6390 and 6390X, the associated serdes
interfaces must be powered off/on.
Both 6390X and 6390 share code to do so, but it currently uses the 6390
specific helper mv88e6390_serdes_power() to disable and enable the
serdes interface.
This call will fail silently on 6390X when trying so set a 10G interface
such as XAUI or RXAUI, since mv88e6390_serdes_power() internally grabs
the lane number based on modes supported by the 6390, and returns 0 when
getting -ENODEV as a lane number.
Using mv88e6390x_serdes_power() should be safe here, since we explicitly
rule-out all ports but the 9 and 10, and because modes supported by 6390
ports 9 and 10 are a subset of those supported on 6390X.
This was tested on 6390X using RXAUI mode.
Fixes: 364e9d7776a3 ("net: dsa: mv88e6xxx: Power on/off SERDES on cmode change")
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/dsa/mv88e6xxx/port.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c
index ebd26b6a93e6b..4b02c96f6786b 100644
--- a/drivers/net/dsa/mv88e6xxx/port.c
+++ b/drivers/net/dsa/mv88e6xxx/port.c
@@ -408,7 +408,7 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
return err;
}
- err = mv88e6390_serdes_power(chip, port, false);
+ err = mv88e6390x_serdes_power(chip, port, false);
if (err)
return err;
@@ -424,7 +424,7 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
if (err)
return err;
- err = mv88e6390_serdes_power(chip, port, true);
+ err = mv88e6390x_serdes_power(chip, port, true);
if (err)
return err;
--
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