net/mlx5: Fix passing zero to 'PTR_ERR'

Fix smatch warnings:

drivers/net/ethernet/mellanox/mlx5/core/esw/acl/egress_lgcy.c:105 esw_acl_egress_lgcy_setup() warn: passing zero to 'PTR_ERR'
drivers/net/ethernet/mellanox/mlx5/core/esw/acl/egress_ofld.c:177 esw_acl_egress_ofld_setup() warn: passing zero to 'PTR_ERR'
drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_lgcy.c:184 esw_acl_ingress_lgcy_setup() warn: passing zero to 'PTR_ERR'
drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c:262 esw_acl_ingress_ofld_setup() warn: passing zero to 'PTR_ERR'

esw_acl_table_create() never returns NULL, so
NULL test should be removed.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NSaeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/esw/acl/egress_lgcy.c

@@ -101,7 +101,7 @@ int esw_acl_egress_lgcy_setup(struct mlx5_eswitch *esw,
 	vport->egress.acl = esw_acl_table_create(esw, vport->vport,
 						 MLX5_FLOW_NAMESPACE_ESW_EGRESS,
 						 table_size);
-	if (IS_ERR_OR_NULL(vport->egress.acl)) {
+	if (IS_ERR(vport->egress.acl)) {
 		err = PTR_ERR(vport->egress.acl);
 		vport->egress.acl = NULL;
 		goto out;

drivers/net/ethernet/mellanox/mlx5/core/esw/acl/egress_ofld.c

@@ -173,7 +173,7 @@ int esw_acl_egress_ofld_setup(struct mlx5_eswitch *esw, struct mlx5_vport *vport
 		table_size++;
 	vport->egress.acl = esw_acl_table_create(esw, vport->vport,
 						 MLX5_FLOW_NAMESPACE_ESW_EGRESS, table_size);
-	if (IS_ERR_OR_NULL(vport->egress.acl)) {
+	if (IS_ERR(vport->egress.acl)) {
 		err = PTR_ERR(vport->egress.acl);
 		vport->egress.acl = NULL;
 		return err;

drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_lgcy.c

@@ -180,7 +180,7 @@ int esw_acl_ingress_lgcy_setup(struct mlx5_eswitch *esw,
 		vport->ingress.acl = esw_acl_table_create(esw, vport->vport,
 							  MLX5_FLOW_NAMESPACE_ESW_INGRESS,
 							  table_size);
-		if (IS_ERR_OR_NULL(vport->ingress.acl)) {
+		if (IS_ERR(vport->ingress.acl)) {
 			err = PTR_ERR(vport->ingress.acl);
 			vport->ingress.acl = NULL;
 			return err;

drivers/net/ethernet/mellanox/mlx5/core/esw/acl/ingress_ofld.c

@@ -258,7 +258,7 @@ int esw_acl_ingress_ofld_setup(struct mlx5_eswitch *esw,
 	vport->ingress.acl = esw_acl_table_create(esw, vport->vport,
 						  MLX5_FLOW_NAMESPACE_ESW_INGRESS,
 						  num_ftes);
-	if (IS_ERR_OR_NULL(vport->ingress.acl)) {
+	if (IS_ERR(vport->ingress.acl)) {
 		err = PTR_ERR(vport->ingress.acl);
 		vport->ingress.acl = NULL;
 		return err;