Re: [PATCH net-next] net/mlx5e: Do not use err uninitialized in mlx5e_rep_add_meta_tunnel_rule()
From: Nick Desaulniers <hidden>
Date: 2022-08-25 18:20:08
Also in:
linux-patches, linux-rdma, lkml, llvm
On Thu, Aug 25, 2022 at 11:06 AM Nathan Chancellor [off-list ref] wrote:
Clang warns:
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c:481:6: error: variable 'err' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
if (IS_ERR(flow_rule)) {
^~~~~~~~~~~~~~~~~
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c:489:9: note: uninitialized use occurs here
return err;
^~~
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c:481:2: note: remove the 'if' if its condition is always true
if (IS_ERR(flow_rule)) {
^~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c:474:9: note: initialize the variable 'err' to silence this warning
int err;
^
= 0
1 error generated.
There is little reason to have the 'goto + error variable' construct in
this function. Get rid of it and just return the PTR_ERR value in the if
statement and 0 at the end.
Fixes: 430e2d5e2a98 ("net/mlx5: E-Switch, Move send to vport meta rule creation")
Link: https://github.com/ClangBuiltLinux/linux/issues/1695
Signed-off-by: Nathan Chancellor <nathan@kernel.org>Thanks for the fix! Reviewed-by: Nick Desaulniers <redacted>
quoted hunk ↗ jump to hunk
--- drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-)diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c index c8617a62e542..a977804137a8 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c@@ -471,22 +471,18 @@ mlx5e_rep_add_meta_tunnel_rule(struct mlx5e_priv *priv) struct mlx5_eswitch_rep *rep = rpriv->rep; struct mlx5_flow_handle *flow_rule; struct mlx5_flow_group *g; - int err; g = esw->fdb_table.offloads.send_to_vport_meta_grp; if (!g) return 0; flow_rule = mlx5_eswitch_add_send_to_vport_meta_rule(esw, rep->vport); - if (IS_ERR(flow_rule)) { - err = PTR_ERR(flow_rule); - goto out; - } + if (IS_ERR(flow_rule)) + return PTR_ERR(flow_rule); rpriv->send_to_vport_meta_rule = flow_rule; -out: - return err; + return 0; } static voidbase-commit: c19d893fbf3f2f8fa864ae39652c7fee939edde2 -- 2.37.2
-- Thanks, ~Nick Desaulniers