From: Mark Bloch <mbloch@nvidia.com>
Date: Tue, 15 Mar 2022 10:44:14 +0000 (+0000)
Subject: net/mlx5: fs, refactor software deletion rule
X-Git-Tag: v5.19-rc1~159^2~197^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d49d63075e0f56f7f05e3ddda59e0484d8a3aa7b;p=thirdparty%2Fkernel%2Flinux.git

net/mlx5: fs, refactor software deletion rule

When deleting a rule make sure that for every type dests_size is
decreased only once and no other logic is executed.

Without this dests_size might be decreased twice when dests_size == 1
so the if for that type won't be entered and if action has
MLX5_FLOW_CONTEXT_ACTION_FWD_DEST set dests_size will be decreased again.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 297e6a468a3e3..ae83962fc5fc4 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -550,8 +550,8 @@ static void del_sw_hw_rule(struct fs_node *node)
 		mutex_unlock(&rule->dest_attr.ft->lock);
 	}
 
-	if (rule->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER  &&
-	    --fte->dests_size) {
+	if (rule->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER) {
+		--fte->dests_size;
 		fte->modify_mask |=
 			BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_ACTION) |
 			BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_FLOW_COUNTERS);
@@ -559,15 +559,15 @@ static void del_sw_hw_rule(struct fs_node *node)
 		goto out;
 	}
 
-	if (rule->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_PORT &&
-	    --fte->dests_size) {
+	if (rule->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_PORT) {
+		--fte->dests_size;
 		fte->modify_mask |= BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_ACTION);
 		fte->action.action &= ~MLX5_FLOW_CONTEXT_ACTION_ALLOW;
 		goto out;
 	}
 
-	if ((fte->action.action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) &&
-	    --fte->dests_size) {
+	if (fte->action.action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
+		--fte->dests_size;
 		fte->modify_mask |=
 			BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST);
 	}