Commit dc413279 authored by Moshe Shemesh's avatar Moshe Shemesh Committed by Greg Kroah-Hartman

net/mlx5: Fix command bad flow on command entry allocation failure


[ Upstream commit 219c81f7 ]

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: e126ba97 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: default avatarMoshe Shemesh <moshe@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent de666960
......@@ -630,6 +630,10 @@ static void dump_command(struct mlx5_core_dev *dev,
pr_debug("\n");
}
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);
......@@ -638,16 +642,27 @@ static void cmd_work_handler(struct work_struct *work)
struct mlx5_cmd_layout *lay;
struct semaphore *sem;
unsigned long flags;
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) {
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);
}
mlx5_core_err(dev, "failed to allocate command entry\n");
up(sem);
return;
}
ent->idx = alloc_ret;
} else {
ent->idx = cmd->max_reg_cmds;
spin_lock_irqsave(&cmd->alloc_lock, flags);
......
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