mlxsw: spectrum_matchall: Perform priority checks earlier

Perform the priority check earlier in the function instead of repeating
it for every action. This fixes a bug that allowed matchall rules with
sample action to be added in front of flower rules on egress.

Fixes: 54d0e963 ("mlxsw: spectrum_matchall: Add support for egress sampling")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -250,10 +250,6 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
 	mall_entry->priority = f->common.prio;
 	mall_entry->ingress = mlxsw_sp_flow_block_is_ingress_bound(block);
 
-	act = &f->rule->action.entries[0];
-
-	switch (act->id) {
-	case FLOW_ACTION_MIRRED:
 	if (flower_prio_valid && mall_entry->ingress &&
 	    mall_entry->priority >= flower_min_prio) {
 		NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
@@ -266,16 +262,15 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
 		err = -EOPNOTSUPP;
 		goto errout;
 	}
+
+	act = &f->rule->action.entries[0];
+
+	switch (act->id) {
+	case FLOW_ACTION_MIRRED:
 		mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_MIRROR;
 		mall_entry->mirror.to_dev = act->dev;
 		break;
 	case FLOW_ACTION_SAMPLE:
-		if (flower_prio_valid &&
-		    mall_entry->priority >= flower_min_prio) {
-			NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
-			err = -EOPNOTSUPP;
-			goto errout;
-		}
 		mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_SAMPLE;
 		mall_entry->sample.params.psample_group = act->sample.psample_group;
 		mall_entry->sample.params.truncate = act->sample.truncate;