dpaa2-switch: reorganize dpaa2_switch_cls_matchall_replace

Extract the necessary steps to offload a filter by using the ACL table
in a separate function - dpaa2_switch_cls_matchall_replace_acl().

This is intended to help with the code readability when the mirroring
support is added.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c

@@ -457,7 +457,8 @@ int dpaa2_switch_cls_flower_destroy(struct dpaa2_switch_filter_block *block,
 	return dpaa2_switch_acl_tbl_remove_entry(block, entry);
 }
 
-int dpaa2_switch_cls_matchall_replace(struct dpaa2_switch_filter_block *block,
+static int
+dpaa2_switch_cls_matchall_replace_acl(struct dpaa2_switch_filter_block *block,
 				      struct tc_cls_matchall_offload *cls)
 {
 	struct netlink_ext_ack *extack = cls->common.extack;
@@ -466,11 +467,6 @@ int dpaa2_switch_cls_matchall_replace(struct dpaa2_switch_filter_block *block,
 	struct flow_action_entry *act;
 	int err;
 
-	if (!flow_offload_has_one_action(&cls->rule->action)) {
-		NL_SET_ERR_MSG(extack, "Only singular actions are supported");
-		return -EOPNOTSUPP;
-	}
-
 	if (dpaa2_switch_acl_tbl_is_full(block)) {
 		NL_SET_ERR_MSG(extack, "Maximum filter capacity reached");
 		return -ENOMEM;
@@ -501,6 +497,29 @@ int dpaa2_switch_cls_matchall_replace(struct dpaa2_switch_filter_block *block,
 	return err;
 }
 
+int dpaa2_switch_cls_matchall_replace(struct dpaa2_switch_filter_block *block,
+				      struct tc_cls_matchall_offload *cls)
+{
+	struct netlink_ext_ack *extack = cls->common.extack;
+	struct flow_action_entry *act;
+
+	if (!flow_offload_has_one_action(&cls->rule->action)) {
+		NL_SET_ERR_MSG(extack, "Only singular actions are supported");
+		return -EOPNOTSUPP;
+	}
+
+	act = &cls->rule->action.entries[0];
+	switch (act->id) {
+	case FLOW_ACTION_REDIRECT:
+	case FLOW_ACTION_TRAP:
+	case FLOW_ACTION_DROP:
+		return dpaa2_switch_cls_matchall_replace_acl(block, cls);
+	default:
+		NL_SET_ERR_MSG_MOD(extack, "Action not supported");
+		return -EOPNOTSUPP;
+	}
+}
+
 int dpaa2_switch_cls_matchall_destroy(struct dpaa2_switch_filter_block *block,
 				      struct tc_cls_matchall_offload *cls)
 {