[PATCH 5.15 108/177] net: dsa: mv88e6xxx: Fix port_hidden_wait to account for port_base_addr

[Greg Kroah-Hartman]

From: Nathan Rossi <nathan@xxxxxxxxxxxxxxx>

[ Upstream commit 24cbdb910bb62b5be3865275e5682be1a7708c0f ]

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.
MV88E6390).

Fixes: 609070133aff ("net: dsa: mv88e6xxx: update code operating on hidden registers")
Signed-off-by: Nathan Rossi <nathan@xxxxxxxxxxxxxxx>
Reviewed-by: Marek Behún <kabel@xxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Link: https://lore.kernel.org/r/20220425070454.348584-1-nathan@xxxxxxxxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 b49d05f0e117..7a9f9ff6dedf 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_CTRL_PORT,
+				       MV88E6XXX_PORT_RESERVED_1A, bit, 0);
 }
 
 int mv88e6xxx_port_hidden_read(struct mv88e6xxx_chip *chip, int block, int port,
-- 
2.35.1