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[net,v2,4/7] net/mlx5: Fix deletion of duplicate rules

Message ID 20201105202129.23644-5-saeedm@nvidia.com
State Accepted
Delegated to: David Miller
Headers show
Series [net,v2,1/7] net/mlx5e: Fix modify header actions memory leak | expand


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jkicinski/module_param success Was 0 now: 0
jkicinski/build_32bit success Errors and warnings before: 0 this patch: 0
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jkicinski/checkpatch success total: 0 errors, 0 warnings, 0 checks, 14 lines checked
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Commit Message

Saeed Mahameed Nov. 5, 2020, 8:21 p.m. UTC
From: Maor Gottlieb <maorg@nvidia.com>

When a rule is duplicated, the refcount of the rule is increased so only
the second deletion of the rule should cause destruction of the FTE.
Currently, the FTE will be destroyed in the first deletion of rule since
the modify_mask will be 0.
Fix it and call to destroy FTE only if all the rules (FTE's children)
have been removed.

Fixes: 718ce4d601db ("net/mlx5: Consolidate update FTE for all removal changes")
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
 drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
diff mbox series


diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 16091838bfcf..325a5b0d6829 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -2010,10 +2010,11 @@  void mlx5_del_flow_rules(struct mlx5_flow_handle *handle)
 	down_write_ref_node(&fte->node, false);
 	for (i = handle->num_rules - 1; i >= 0; i--)
 		tree_remove_node(&handle->rule[i]->node, true);
-	if (fte->modify_mask && fte->dests_size) {
-		modify_fte(fte);
+	if (fte->dests_size) {
+		if (fte->modify_mask)
+			modify_fte(fte);
 		up_write_ref_node(&fte->node, false);
-	} else {
+	} else if (list_empty(&fte->node.children)) {
 		/* Avoid double call to del_hw_fte */
 		fte->node.del_hw_func = NULL;