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author | Dmytro Linkin <dlinkin@nvidia.com> | 2021-05-14 11:14:19 +0300 |
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committer | Saeed Mahameed <saeedm@nvidia.com> | 2021-06-17 01:36:47 +0300 |
commit | a5ae8fc9058e37437c8c1f82b3d412b4abd1b9e6 (patch) | |
tree | ec9fc0e79e881a6a268aff1094bd9feb68e5bd3e /drivers/net/ethernet/mellanox/mlx5/core/mr.c | |
parent | 65fb7d109abe3a1a9f1c2d3ba7e1249bc978d5f0 (diff) | |
download | linux-a5ae8fc9058e37437c8c1f82b3d412b4abd1b9e6.tar.xz |
net/mlx5e: Don't create devices during unload flow
Running devlink reload command for port in switchdev mode cause
resources to corrupt: driver can't release allocated EQ and reclaim
memory pages, because "rdma" auxiliary device had add CQs which blocks
EQ from deletion.
Erroneous sequence happens during reload-down phase, and is following:
1. detach device - suspends auxiliary devices which support it, destroys
others. During this step "eth-rep" and "rdma-rep" are destroyed,
"eth" - suspended.
2. disable SRIOV - moves device to legacy mode; as part of disablement -
rescans drivers. This step adds "rdma" auxiliary device.
3. destroy EQ table - <failure>.
Driver shouldn't create any device during unload flows. To handle that
implement MLX5_PRIV_FLAGS_DETACH flag, set it on device detach and unset
on device attach. If flag is set do no-op on drivers rescan.
Fixes: a925b5e309c9 ("net/mlx5: Register mlx5 devices to auxiliary virtual bus")
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/mr.c')
0 files changed, 0 insertions, 0 deletions