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net: b53: enable BPDU reception for management port

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[ Upstream commit 36355ddfe8955f226a88a543ed354b9f6b84cd70 ]

For STP to work, receiving BPDUs is essential, but the appropriate bit
was never set. Without GC_RX_BPDU_EN, the switch chip will filter all
BPDUs, even if an appropriate PVID VLAN was setup.

Fixes: ff39c2d686 ("net: dsa: b53: Add bridge support")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Link: https://patch.msgid.link/20250414200434.194422-1-jonas.gorski@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonas Gorski
2025-04-14 22:04:34 +02:00
committed by Greg Kroah-Hartman
parent 2315cfaf47
commit c9dbc7ec44
1 changed files with 10 additions and 0 deletions
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10
drivers/net/dsa/b53/b53_common.c
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@@ -724,6 +724,15 @@ static void b53_enable_mib(struct b53_device *dev)
b53_write8(dev, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, gc);
}
static void b53_enable_stp(struct b53_device *dev)
{
u8 gc;
b53_read8(dev, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, &gc);
gc |= GC_RX_BPDU_EN;
b53_write8(dev, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, gc);
}
static u16 b53_default_pvid(struct b53_device *dev)
{
if (is5325(dev) || is5365(dev))
@@ -863,6 +872,7 @@ static int b53_switch_reset(struct b53_device *dev)
}
b53_enable_mib(dev);
b53_enable_stp(dev);
return b53_flush_arl(dev, FAST_AGE_STATIC);
}