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| author | Eyal Perry <eyalpe@mellanox.com> | 2014-05-14 12:15:13 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-05-14 15:40:33 -0400 |
| commit | c05a116f397242e0ed4353bb4d36671a1f86ec77 (patch) | |
| tree | 5af96ab175fdb0adecc4496fe46363f0732f4e76 | |
| parent | ee755324a3aa1459c7e184e12c170b89bd159f22 (diff) | |
| download | blackbird-op-linux-c05a116f397242e0ed4353bb4d36671a1f86ec77.tar.gz blackbird-op-linux-c05a116f397242e0ed4353bb4d36671a1f86ec77.zip | |
net/mlx4_core: Fix smatch error - possible access to a null variable
Fix the "error: we previously assumed 'out_param' could be null" found
by smatch semantic checker on:
drivers/net/ethernet/mellanox/mlx4/cmd.c:506 mlx4_cmd_poll()
drivers/net/ethernet/mellanox/mlx4/cmd.c:578 mlx4_cmd_wait()
Signed-off-by: Eyal Perry <eyalpe@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/cmd.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c index 24201033661b..357dcb0f04fb 100644 --- a/drivers/net/ethernet/mellanox/mlx4/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c @@ -473,6 +473,13 @@ static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param, goto out; } + if (out_is_imm && !out_param) { + mlx4_err(dev, "response expected while output mailbox is NULL for command 0x%x\n", + op); + err = -EINVAL; + goto out; + } + err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0, in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0); if (err) @@ -551,6 +558,13 @@ static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param, cmd->free_head = context->next; spin_unlock(&cmd->context_lock); + if (out_is_imm && !out_param) { + mlx4_err(dev, "response expected while output mailbox is NULL for command 0x%x\n", + op); + err = -EINVAL; + goto out; + } + init_completion(&context->done); mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0, |
