diff options
| author |   Moshe Shemesh <moshe@nvidia.com> | 2021-12-05 12:07:49 +0200 |
|---|---|---|
| committer |   Saeed Mahameed <saeedm@nvidia.com> | 2022-01-06 16:55:42 -0800 |
| commit | 8e715cd613a1e872b9d918e912d90b399785761a (patch) | |
| tree | 9a65392adb062c44fb0115461857b60d1906baa4 /drivers/net/ethernet/mellanox | |
| parent | net/mlx5e: Sync VXLAN udp ports during uplink representor profile change (diff) | |
| download | linux-dev-8e715cd613a1e872b9d918e912d90b399785761a.tar.xz linux-dev-8e715cd613a1e872b9d918e912d90b399785761a.zip | |
net/mlx5: Set command entry semaphore up once got index free
Avoid a race where command work handler may fail to allocate command
entry index, by holding the command semaphore down till command entry
index is being freed.
Fixes: 410bd754cd73 ("net/mlx5: Add retry mechanism to the command entry index allocation")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Eran Ben Elisha <eranbe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c index a46284ca5172..f588503157d0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -148,8 +148,12 @@ static void cmd_ent_put(struct mlx5_cmd_work_ent *ent) if (!refcount_dec_and_test(&ent->refcnt)) return; - if (ent->idx >= 0) - cmd_free_index(ent->cmd, ent->idx); + if (ent->idx >= 0) { + struct mlx5_cmd *cmd = ent->cmd; + + cmd_free_index(cmd, ent->idx); + up(ent->page_queue ? &cmd->pages_sem : &cmd->sem); + } cmd_free_ent(ent); } @@ -1602,8 +1606,6 @@ static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool force vector = vec & 0xffffffff; for (i = 0; i < (1 << cmd->log_sz); i++) { if (test_bit(i, &vector)) { - struct semaphore *sem; - ent = cmd->ent_arr[i]; /* if we already completed the command, ignore it */ @@ -1626,10 +1628,6 @@ static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool force dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) cmd_ent_put(ent); - if (ent->page_queue) - sem = &cmd->pages_sem; - else - sem = &cmd->sem; ent->ts2 = ktime_get_ns(); memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); dump_command(dev, ent, 0); @@ -1683,7 +1681,6 @@ static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool force */ complete(&ent->done); } - up(sem); } } } |