6.12-stable review patch. If anyone has any objections, please let me know.
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From: Tristram Ha tristram.ha@microchip.com
[ Upstream commit e318cd6714592fb762fcab59c5684a442243a12f ]
ksz9477_hsr_join() is called once to setup the HSR port membership, but the port can be enabled later, or disabled and enabled back and the port membership is not set correctly inside ksz_update_port_member(). The added code always use the correct HSR port membership for HSR port that is enabled.
Fixes: 2d61298fdd7b ("net: dsa: microchip: Enable HSR offloading for KSZ9477") Reported-by: Frieder Schrempf frieder.schrempf@kontron.de Signed-off-by: Tristram Ha tristram.ha@microchip.com Reviewed-by: Łukasz Majewski lukma@nabladev.com Tested-by: Frieder Schrempf frieder.schrempf@kontron.de Reviewed-by: Frieder Schrempf frieder.schrempf@kontron.de Link: https://patch.msgid.link/20250819010457.563286-1-Tristram.Ha@microchip.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/microchip/ksz_common.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index bf26cd0abf6d..0a34fd6887fc 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -2208,6 +2208,12 @@ static void ksz_update_port_member(struct ksz_device *dev, int port) dev->dev_ops->cfg_port_member(dev, i, val | cpu_port); }
+ /* HSR ports are setup once so need to use the assigned membership + * when the port is enabled. + */ + if (!port_member && p->stp_state == BR_STATE_FORWARDING && + (dev->hsr_ports & BIT(port))) + port_member = dev->hsr_ports; dev->dev_ops->cfg_port_member(dev, port, port_member | cpu_port); }