[RFC PATCH net-next v2 02/10] net: dsa: b53: prevent FAST_AGE access on BCM5325
From: Álvaro Fernández Rojas <hidden>
Date: 2025-06-03 20:49:08
Also in:
lkml
Subsystem:
broadcom b53/sf2 ethernet switch driver, networking drivers, networking [dsa], the rest · Maintainers:
Florian Fainelli, Jonas Gorski, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
BCM5325 doesn't implement FAST_AGE registers so we should avoid reading or
writing them.
Fixes: 967dd82ffc52 ("net: dsa: b53: Add support for Broadcom RoboSwitch")
Signed-off-by: Álvaro Fernández Rojas <redacted>
---
drivers/net/dsa/b53/b53_common.c | 9 +++++++++
1 file changed, 9 insertions(+)
v2: no changes.
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index feea531732c7b..525306193f80e 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c@@ -486,6 +486,9 @@ static int b53_flush_arl(struct b53_device *dev, u8 mask) { unsigned int i; + if (is5325(dev)) + return 0; + b53_write8(dev, B53_CTRL_PAGE, B53_FAST_AGE_CTRL, FAST_AGE_DONE | FAST_AGE_DYNAMIC | mask);
@@ -510,6 +513,9 @@ static int b53_flush_arl(struct b53_device *dev, u8 mask) static int b53_fast_age_port(struct b53_device *dev, int port) { + if (is5325(dev)) + return 0; + b53_write8(dev, B53_CTRL_PAGE, B53_FAST_AGE_PORT_CTRL, port); return b53_flush_arl(dev, FAST_AGE_PORT);
@@ -517,6 +523,9 @@ static int b53_fast_age_port(struct b53_device *dev, int port) static int b53_fast_age_vlan(struct b53_device *dev, u16 vid) { + if (is5325(dev)) + return 0; + b53_write16(dev, B53_CTRL_PAGE, B53_FAST_AGE_VID_CTRL, vid); return b53_flush_arl(dev, FAST_AGE_VLAN);
--
2.39.5