Merge branch 'mlxsw-dcb-fixes'

Ido Schimmel says:

====================
mlxsw: DCB fixes

Patches 1 and 2 fix a problem in which PAUSE frames settings are wrongly
overridden when ieee_setpfc() gets called.

Patch 3 adds a missing rollback in port's creation error path.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -2220,6 +2220,7 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 err_core_port_init:
 	unregister_netdev(dev);
 err_register_netdev:
+	mlxsw_sp_port_dcb_fini(mlxsw_sp_port);
 err_port_dcb_init:
 err_port_ets_init:
 err_port_buffers_init:

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

@@ -341,6 +341,8 @@ static int mlxsw_sp_port_pfc_set(struct mlxsw_sp_port *mlxsw_sp_port,
 	char pfcc_pl[MLXSW_REG_PFCC_LEN];
 
 	mlxsw_reg_pfcc_pack(pfcc_pl, mlxsw_sp_port->local_port);
+	mlxsw_reg_pfcc_pprx_set(pfcc_pl, mlxsw_sp_port->link.rx_pause);
+	mlxsw_reg_pfcc_pptx_set(pfcc_pl, mlxsw_sp_port->link.tx_pause);
 	mlxsw_reg_pfcc_prio_pack(pfcc_pl, pfc->pfc_en);
 
 	return mlxsw_reg_write(mlxsw_sp_port->mlxsw_sp->core, MLXSW_REG(pfcc),
@@ -351,17 +353,17 @@ static int mlxsw_sp_dcbnl_ieee_setpfc(struct net_device *dev,
 				      struct ieee_pfc *pfc)
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
+	bool pause_en = mlxsw_sp_port_is_pause_en(mlxsw_sp_port);
 	int err;
 
-	if ((mlxsw_sp_port->link.tx_pause || mlxsw_sp_port->link.rx_pause) &&
-	    pfc->pfc_en) {
+	if (pause_en && pfc->pfc_en) {
 		netdev_err(dev, "PAUSE frames already enabled on port\n");
 		return -EINVAL;
 	}
 
 	err = __mlxsw_sp_port_headroom_set(mlxsw_sp_port, dev->mtu,
 					   mlxsw_sp_port->dcb.ets->prio_tc,
-					   false, pfc);
+					   pause_en, pfc);
 	if (err) {
 		netdev_err(dev, "Failed to configure port's headroom for PFC\n");
 		return err;
@@ -380,7 +382,7 @@ static int mlxsw_sp_dcbnl_ieee_setpfc(struct net_device *dev,
 
 err_port_pfc_set:
 	__mlxsw_sp_port_headroom_set(mlxsw_sp_port, dev->mtu,
-				     mlxsw_sp_port->dcb.ets->prio_tc, false,
+				     mlxsw_sp_port->dcb.ets->prio_tc, pause_en,
 				     mlxsw_sp_port->dcb.pfc);
 	return err;
 }