diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2025-06-14 09:59:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 18:30:38 +0200 |
| commit | 9f45e4858f8096bb27f9a2c75fc24a538dffad67 (patch) | |
| tree | 9b90f142a2a29d699adedacf49c3e810555a2d9e | |
| parent | 15cf46cc6ecc7a54b397294675d11c379ddf69ef (diff) | |
net: dsa: b53: prevent DIS_LEARNING access on BCM5325
[ 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>
| -rw-r--r-- | drivers/net/dsa/b53/b53_common.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 0085adecaf2d..1ee2e5e9a5b2 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -581,6 +581,9 @@ 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); @@ -2197,7 +2200,13 @@ 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; |