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| author | Tariq Toukan <tariqt@mellanox.com> | 2020-05-04 11:36:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-20 09:16:53 +0300 |
| commit | 8d50559b5c8afb6c0969ce9d4e64e95870c09524 (patch) | |
| tree | f59dd6713b7459059373e718c6117efcd288569d /drivers/net/ethernet/mellanox | |
| parent | 93f18b82d5e4a70fa79ed6d0eacf3858ddb219b3 (diff) | |
| download | linux-8d50559b5c8afb6c0969ce9d4e64e95870c09524.tar.xz | |
net/mlx4_core: Fix use of ENOSPC around mlx4_counter_alloc()
[ Upstream commit 40e473071dbad04316ddc3613c3a3d1c75458299 ]
When ENOSPC is set the idx is still valid and gets set to the global
MLX4_SINK_COUNTER_INDEX. However gcc's static analysis cannot tell that
ENOSPC is impossible from mlx4_cmd_imm() and gives this warning:
drivers/net/ethernet/mellanox/mlx4/main.c:2552:28: warning: 'idx' may be
used uninitialized in this function [-Wmaybe-uninitialized]
2552 | priv->def_counter[port] = idx;
Also, when ENOSPC is returned mlx4_allocate_default_counters should not
fail.
Fixes: 6de5f7f6a1fa ("net/mlx4_core: Allocate default counter per port")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/ethernet/mellanox')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/main.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 12d4b891301b..cf9011bb6e0f 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -2503,6 +2503,7 @@ static int mlx4_allocate_default_counters(struct mlx4_dev *dev) if (!err || err == -ENOSPC) { priv->def_counter[port] = idx; + err = 0; } else if (err == -ENOENT) { err = 0; continue; @@ -2553,7 +2554,8 @@ int mlx4_counter_alloc(struct mlx4_dev *dev, u32 *idx, u8 usage) MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); if (!err) *idx = get_param_l(&out_param); - + if (WARN_ON(err == -ENOSPC)) + err = -EINVAL; return err; } return __mlx4_counter_alloc(dev, idx); |