5.15-stable review patch. If anyone has any objections, please let me know.
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From: Patrisious Haddad phaddad@nvidia.com
[ Upstream commit 8ec40e3f1f72bf8f8accf18020d487caa99f46a4 ]
When attempting to add a rule to an existing flow group, if a matching flow group exists but is not active, the error code returned should be EAGAIN, so that the rule can be added to the matching flow group once it is active, rather than ENOENT, which indicates that no matching flow group was found.
Fixes: bd71b08ec2ee ("net/mlx5: Support multiple updates of steering rules in parallel") Signed-off-by: Gavi Teitz gavi@nvidia.com Signed-off-by: Roi Dayan roid@nvidia.com Signed-off-by: Patrisious Haddad phaddad@nvidia.com Reviewed-by: Tariq Toukan tariqt@nvidia.com Signed-off-by: Mark Bloch mbloch@nvidia.com Link: https://patch.msgid.link/20250610151514.1094735-4-mbloch@nvidia.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c index 8ff2b81960de7..ef56a71e43d70 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c @@ -1876,6 +1876,7 @@ try_add_to_existing_fg(struct mlx5_flow_table *ft, struct mlx5_flow_handle *rule; struct match_list *iter; bool take_write = false; + bool try_again = false; struct fs_fte *fte; u64 version = 0; int err; @@ -1935,6 +1936,7 @@ try_add_to_existing_fg(struct mlx5_flow_table *ft, nested_down_write_ref_node(&g->node, FS_LOCK_PARENT);
if (!g->node.active) { + try_again = true; up_write_ref_node(&g->node, false); continue; } @@ -1956,7 +1958,8 @@ try_add_to_existing_fg(struct mlx5_flow_table *ft, tree_put_node(&fte->node, false); return rule; } - rule = ERR_PTR(-ENOENT); + err = try_again ? -EAGAIN : -ENOENT; + rule = ERR_PTR(err); out: kmem_cache_free(steering->ftes_cache, fte); return rule;