netdev - [net V2 12/15] net/mlx5e: Fix return status when setting unsupported FEC mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201001195247.66636-13-saeed@kernel.org>
Date:   Thu,  1 Oct 2020 12:52:44 -0700
From:   saeed@...nel.org
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Aya Levin <ayal@...lanox.com>,
        Eran Ben Elisha <eranbe@...dia.com>,
        Moshe Shemesh <moshe@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net V2 12/15] net/mlx5e: Fix return status when setting unsupported FEC mode

From: Aya Levin <ayal@...lanox.com>

Verify the configured FEC mode is supported by at least a single link
mode before applying the command. Otherwise fail the command and return
"Operation not supported".
Prior to this patch, the command was successful, yet it falsely set all
link modes to FEC auto mode - like configuring FEC mode to auto. Auto
mode is the default configuration if a link mode doesn't support the
configured FEC mode.

Fixes: b5ede32d3329 ("net/mlx5e: Add support for FEC modes based on 50G per lane links")
Signed-off-by: Aya Levin <ayal@...lanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@...dia.com>
Reviewed-by: Moshe Shemesh <moshe@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/port.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/port.c b/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
index 96608dbb9314..308fd279669e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
@@ -569,6 +569,9 @@ int mlx5e_set_fec_mode(struct mlx5_core_dev *dev, u16 fec_policy)
 	if (fec_policy >= (1 << MLX5E_FEC_LLRS_272_257_1) && !fec_50g_per_lane)
 		return -EOPNOTSUPP;
 
+	if (fec_policy && !mlx5e_fec_in_caps(dev, fec_policy))
+		return -EOPNOTSUPP;
+
 	MLX5_SET(pplm_reg, in, local_port, 1);
 	err = mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPLM, 0, 0);
 	if (err)
-- 
2.26.2