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Date:   Sun, 24 Apr 2022 15:31:43 +0000
From:   Nathan Rossi <>
Cc:     Nathan Rossi <>,
        Marek Behun <>, Andrew Lunn <>,
        Vivien Didelot <>,
        Florian Fainelli <>,
        Vladimir Oltean <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        Paolo Abeni <>
Subject: [PATCH v2] net: dsa: mv88e6xxx: Fix port_hidden_wait to account for

The other port_hidden functions rely on the port_read/port_write
functions to access the hidden control port. These functions apply the
offset for port_base_addr where applicable. Update port_hidden_wait to
use the port_wait_bit so that port_base_addr offsets are accounted for
when waiting for the busy bit to change.

Without the offset the port_hidden_wait function would timeout on
devices that have a non-zero port_base_addr (e.g. MV88E6141), however
devices that have a zero port_base_addr would operate correctly (e.g.

Fixes: ea89098ef9a5 ("net: dsa: mv88x6xxx: mv88e6390 errata")
Signed-off-by: Nathan Rossi <>
Changes in v2:
- Add fixes
 drivers/net/dsa/mv88e6xxx/port_hidden.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/port_hidden.c b/drivers/net/dsa/mv88e6xxx/port_hidden.c
index b49d05f0e1..7a9f9ff6de 100644
--- a/drivers/net/dsa/mv88e6xxx/port_hidden.c
+++ b/drivers/net/dsa/mv88e6xxx/port_hidden.c
@@ -40,8 +40,9 @@ int mv88e6xxx_port_hidden_wait(struct mv88e6xxx_chip *chip)
 	int bit = __bf_shf(MV88E6XXX_PORT_RESERVED_1A_BUSY);
-	return mv88e6xxx_wait_bit(chip, MV88E6XXX_PORT_RESERVED_1A_CTRL_PORT,
-				  MV88E6XXX_PORT_RESERVED_1A, bit, 0);
+	return mv88e6xxx_port_wait_bit(chip,
+				       MV88E6XXX_PORT_RESERVED_1A, bit, 0);
 int mv88e6xxx_port_hidden_read(struct mv88e6xxx_chip *chip, int block, int port,

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