Re: [PATCH v3 net-next 10/10] net: dsa: microchip: add support for vlan operations

On Fri, Jul 23, 2021 at 11:01:08PM +0530, Prasanna Vengateshan wrote:

+static int lan937x_port_vlan_add(struct dsa_switch *ds, int port,
+				 const struct switchdev_obj_port_vlan *vlan,
+				 struct netlink_ext_ack *extack)
+{
+	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
+	struct ksz_device *dev = ds->priv;
+	struct lan937x_vlan vlan_entry;
+	int ret;
+
+	ret = lan937x_get_vlan_table(dev, vlan->vid, &vlan_entry);
+	if (ret < 0) {
+		NL_SET_ERR_MSG_MOD(extack, "Failed to get vlan table\n");

The NL_SET_ERR_MSG_MOD function already adds the \n at the end.

+		return ret;
+	}
+
+	vlan_entry.fid = lan937x_get_fid(vlan->vid);
+	vlan_entry.valid = true;
+
+	/* set/clear switch port when updating vlan table registers */
+	if (untagged)
+		vlan_entry.untag_prtmap |= BIT(port);
+	else
+		vlan_entry.untag_prtmap &= ~BIT(port);
+
+	vlan_entry.fwd_map |= BIT(port);
+
+	ret = lan937x_set_vlan_table(dev, vlan->vid, &vlan_entry);
+	if (ret < 0) {
+		NL_SET_ERR_MSG_MOD(extack, "Failed to set vlan table\n");
+		return ret;
+	}
+
+	/* change PVID */
+	if (vlan->flags & BRIDGE_VLAN_INFO_PVID) {
+		ret = lan937x_pwrite16(dev, port, REG_PORT_DEFAULT_VID,
+				       vlan->vid);
+		if (ret < 0) {
+			NL_SET_ERR_MSG_MOD(extack, "Failed to set pvid\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}

Side question: do you think the ds->configure_vlan_while_not_filtering = false
from ksz9477.c and ksz8795.c serve any purpose, considering that you did
not need this setting for lan937x? If not, could you please send a patch
to remove that setting from those 2 other KSZ drivers? Thanks.