mlxsw: spectrum: Call mlxsw_sp_bridge_vxlan_{join, leave}() for VLAN-aware bridge

JIRA: https://issues.redhat.com/browse/RHEL-94569

commit a13fc7e
Author: Amit Cohen <amcohen@nvidia.com>
Date:   Mon Mar 17 18:37:27 2025 +0100

    mlxsw: spectrum: Call mlxsw_sp_bridge_vxlan_{join, leave}() for VLAN-aware bridge

    mlxsw_sp_bridge_vxlan_{join,leave}() are not called when a VXLAN device
    joins or leaves a VLAN-aware bridge. As mentioned in the comment - when the
    bridge is VLAN-aware, the VNI of the VXLAN device needs to be mapped to a
    VLAN, but at this point no VLANs are configured on the VxLAN device. This
    means that we can call the APIs, but there is no point to do that, as they
    do not configure anything in such cases.

    Next patch will extend mlxsw_sp_bridge_vxlan_{join,leave}() to set hardware
    domain for VXLAN, this should be done also when a VXLAN device joins or
    leaves a VLAN-aware bridge. Call the APIs, which for now do not do anything
    in these flows.

    Align the call to mlxsw_sp_bridge_vxlan_leave() to be called like
    mlxsw_sp_bridge_vxlan_join(), only in case that the VXLAN device is up,
    so move the check to be done before calling
    mlxsw_sp_bridge_vxlan_{join,leave}(). This does not change the existing
    behavior, as there is a similar check inside mlxsw_sp_bridge_vxlan_leave().

    Signed-off-by: Amit Cohen <amcohen@nvidia.com>
    Reviewed-by: Petr Machata <petrm@nvidia.com>
    Reviewed-by: Ido Schimmel <idosch@nvidia.com>
    Signed-off-by: Petr Machata <petrm@nvidia.com>
    Reviewed-by: Simon Horman <horms@kernel.org>
    Link: https://patch.msgid.link/994c1ea93520f9ea55d1011cd47dc2180d526484.1742224300.git.petrm@nvidia.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Ivan Vecera <ivecera@redhat.com>

Author: ivecera

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -5230,25 +5230,13 @@ static int mlxsw_sp_netdevice_vxlan_event(struct mlxsw_sp *mlxsw_sp,
 			return 0;
 		if (!mlxsw_sp_bridge_vxlan_is_valid(upper_dev, extack))
 			return -EOPNOTSUPP;
-		if (cu_info->linking) {
-			if (!netif_running(dev))
-				return 0;
-			/* When the bridge is VLAN-aware, the VNI of the VxLAN
-			 * device needs to be mapped to a VLAN, but at this
-			 * point no VLANs are configured on the VxLAN device
-			 */
-			if (br_vlan_enabled(upper_dev))
-				return 0;
+		if (!netif_running(dev))
+			return 0;
+		if (cu_info->linking)
 			return mlxsw_sp_bridge_vxlan_join(mlxsw_sp, upper_dev,
 							  dev, 0, extack);
-		} else {
-			/* VLANs were already flushed, which triggered the
-			 * necessary cleanup
-			 */
-			if (br_vlan_enabled(upper_dev))
-				return 0;
+		else
 			mlxsw_sp_bridge_vxlan_leave(mlxsw_sp, dev);
-		}
 		break;
 	case NETDEV_PRE_UP:
 		upper_dev = netdev_master_upper_dev_get(dev);