5.15-stable review patch. If anyone has any objections, please let me know.
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From: Peter Rashleigh peter@rashleigh.ca
[ Upstream commit 12bc14949c4a7272b509af0f1022a0deeb215fd8 ]
mv88e6393x_port_set_policy doesn't correctly shift the ptr value when converting the policy format between the old and new styles, so the target register ends up with the ptr being written over the data bits.
Shift the pointer to align with the format expected by mv88e6393x_port_policy_write().
Fixes: 6584b26020fc ("net: dsa: mv88e6xxx: implement .port_set_policy for Amethyst") Signed-off-by: Peter Rashleigh peter@rashleigh.ca Reviewed-by: Simon Horman horms@kernel.org Message-ID: 20241016040822.3917-1-peter@rashleigh.ca Signed-off-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/mv88e6xxx/port.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c index ab41619a809b3..c94f2de6401cd 100644 --- a/drivers/net/dsa/mv88e6xxx/port.c +++ b/drivers/net/dsa/mv88e6xxx/port.c @@ -1699,6 +1699,7 @@ int mv88e6393x_port_set_policy(struct mv88e6xxx_chip *chip, int port, ptr = shift / 8; shift %= 8; mask >>= ptr * 8; + ptr <<= 8;
err = mv88e6393x_port_policy_read(chip, port, ptr, ®); if (err)