6.6-stable review patch. If anyone has any objections, please let me know.
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From: Álvaro Fernández Rojas noltari@gmail.com
[ Upstream commit 800728abd9f83bda4de62a30ce62a8b41c242020 ]
BCM5325 doesn't implement DIS_LEARNING register so we should avoid reading or writing it.
Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com Link: https://patch.msgid.link/20250614080000.1884236-10-noltari@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/b53/b53_common.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 9e4d66b8ad39..5daefb60885e 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -561,6 +561,9 @@ static void b53_port_set_learning(struct b53_device *dev, int port, { u16 reg;
+ if (is5325(dev)) + return; + b53_read16(dev, B53_CTRL_PAGE, B53_DIS_LEARNING, ®); if (learning) reg &= ~BIT(port); @@ -2062,7 +2065,13 @@ int b53_br_flags_pre(struct dsa_switch *ds, int port, struct switchdev_brport_flags flags, struct netlink_ext_ack *extack) { - if (flags.mask & ~(BR_FLOOD | BR_MCAST_FLOOD | BR_LEARNING)) + struct b53_device *dev = ds->priv; + unsigned long mask = (BR_FLOOD | BR_MCAST_FLOOD); + + if (!is5325(dev)) + mask |= BR_LEARNING; + + if (flags.mask & ~mask) return -EINVAL;
return 0;