From: Nathan Rossi nathan@nathanrossi.com
[ 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@nathanrossi.com Reviewed-by: Marek Behún kabel@kernel.org Reviewed-by: Andrew Lunn andrew@lunn.ch Link: https://lore.kernel.org/r/20220425070454.348584-1-nathan@nathanrossi.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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,