mirror_ubuntu-kernels/drivers/net/ethernet/mellanox
Gal Pressman 992d8a4e38 net/mlx5e: Fix wrong features assignment in case of error
In case of an error in mlx5e_set_features(), 'netdev->features' must be
updated with the correct state of the device to indicate which features
were updated successfully.
To do that we maintain a copy of 'netdev->features' and update it after
successful feature changes, so we can assign it to back to
'netdev->features' if needed.

However, since not all netdev features are handled by the driver (e.g.
GRO/TSO/etc), some features may not be updated correctly in case of an
error updating another feature.

For example, while requesting to disable TSO (feature which is not
handled by the driver) and enable HW-GRO, if an error occurs during
HW-GRO enable, 'oper_features' will be assigned with 'netdev->features'
and HW-GRO turned off. TSO will remain enabled in such case, which is a
bug.

To solve that, instead of using 'netdev->features' as the baseline of
'oper_features' and changing it on set feature success, use 'features'
instead and update it in case of errors.

Fixes: 75b81ce719 ("net/mlx5e: Don't override netdev features field unless in error flow")
Signed-off-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
2021-12-28 22:42:50 -08:00
..
mlx4 net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources() 2021-12-01 19:04:50 -08:00
mlx5/core net/mlx5e: Fix wrong features assignment in case of error 2021-12-28 22:42:50 -08:00
mlxbf_gige gpio updates for v5.16 2021-11-08 11:55:21 -08:00
mlxfw devlink: Reduce struct devlink exposure 2021-10-12 16:29:16 -07:00
mlxsw mlxsw: spectrum_router: Consolidate MAC profiles when possible 2021-12-14 12:56:10 +00:00
Kconfig Add Mellanox BlueField Gigabit Ethernet driver 2021-06-25 11:20:23 -07:00
Makefile Add Mellanox BlueField Gigabit Ethernet driver 2021-06-25 11:20:23 -07:00