[PATCH 5.16 098/285] net/mlx5e: Remove overzealous validations in netlink EEPROM query

Greg Kroah-Hartman
2022-04-12T07:45:53Z

From: Gal Pressman <gal@nvidia.com>

[ Upstream commit 970adfb76095fa719778d70a6b86030d2feb88dd ]

Unlike the legacy EEPROM callbacks, when using the netlink EEPROM query
(get_module_eeprom_by_page) the driver should not try to validate the
query parameters, but just perform the read requested by the userspace.

Recent discussion in the mailing list:
https://lore.kernel.org/netdev/20220120093051.70845141@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net/

Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../net/ethernet/mellanox/mlx5/core/port.c | 23 -------------------
1 file changed, 23 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/port.c b/drivers/net/ethernet/mellanox/mlx5/core/port.c
index 7b16a1188aab..fd79860de723 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/port.c
@@ -433,35 +433,12 @@ int mlx5_query_module_eeprom_by_page(struct mlx5_core_dev *dev,
struct mlx5_module_eeprom_query_params *params,
u8 *data)
{
- u8 module_id;
int err;

err = mlx5_query_module_num(dev, &params->module_number);
if (err)
return err;

- err = mlx5_query_module_id(dev, params->module_number, &module_id);
- if (err)
- return err;
-
- switch (module_id) {
- case MLX5_MODULE_ID_SFP:
- if (params->page > 0)
- return -EINVAL;
- break;
- case MLX5_MODULE_ID_QSFP:
- case MLX5_MODULE_ID_QSFP28:
- case MLX5_MODULE_ID_QSFP_PLUS:
- if (params->page > 3)
- return -EINVAL;
- break;
- case MLX5_MODULE_ID_DSFP:
- break;
- default:
- mlx5_core_err(dev, "Module ID not recognized: 0x%x\n", module_id);
- return -EINVAL;
- }
-
if (params->i2c_address != MLX5_I2C_ADDR_HIGH &&
params->i2c_address != MLX5_I2C_ADDR_LOW) {
mlx5_core_err(dev, "I2C address not recognized: 0x%x\n", params->i2c_address);
--
2.35.1