diff options
| author | Moshe Shemesh <moshe@mellanox.com> | 2017-06-25 18:45:32 +0300 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@mellanox.com> | 2017-07-27 16:40:16 +0300 |
| commit | 219c81f7d1d5a89656cb3b53d3b4e11e93608d80 (patch) | |
| tree | 605f7e1c31bd02226eccc69abd48b8e8d25f33aa /drivers/net/ethernet/mellanox/mlx5/core/cmd.c | |
| parent | 061870800efb4e3d1ad4082a2569363629bdfcfc (diff) | |
| download | linux-0-day-219c81f7d1d5a89656cb3b53d3b4e11e93608d80.tar.gz linux-0-day-219c81f7d1d5a89656cb3b53d3b4e11e93608d80.tar.xz | |
net/mlx5: Fix command bad flow on command entry allocation failure
When driver fail to allocate an entry to send command to FW, it must
notify the calling function and release the memory allocated for
this command.
Fixes: e126ba97dba9e ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/cmd.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c index 25fd32fcdf794..31cbe5e86a013 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -786,6 +786,10 @@ static void cb_timeout_handler(struct work_struct *work) mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true); } +static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg); +static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev, + struct mlx5_cmd_msg *msg); + static void cmd_work_handler(struct work_struct *work) { struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work); @@ -796,17 +800,28 @@ static void cmd_work_handler(struct work_struct *work) struct semaphore *sem; unsigned long flags; bool poll_cmd = ent->polling; + int alloc_ret; sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem; down(sem); if (!ent->page_queue) { - ent->idx = alloc_ent(cmd); - if (ent->idx < 0) { + alloc_ret = alloc_ent(cmd); + if (alloc_ret < 0) { mlx5_core_err(dev, "failed to allocate command entry\n"); + if (ent->callback) { + ent->callback(-EAGAIN, ent->context); + mlx5_free_cmd_msg(dev, ent->out); + free_msg(dev, ent->in); + free_cmd(ent); + } else { + ent->ret = -EAGAIN; + complete(&ent->done); + } up(sem); return; } + ent->idx = alloc_ret; } else { ent->idx = cmd->max_reg_cmds; spin_lock_irqsave(&cmd->alloc_lock, flags); |