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net/mlx5: cmd: Fix memset with byte count warning 

Fix sparse warning:
drivers/net/ethernet/mellanox/mlx5/core/cmd.c:1949:15:
warning: memset with byte count of 271720

mlx5_cmd_stats array is too big to be held inline in mlx5_cmd.
Allocate it separately.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Saeed Mahameed 2020-05-27 23:16:02 -07:00
parent 9ff2e92c46
commit 2553f421f4
3 changed files with 16 additions and 8 deletions
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20
drivers/net/ethernet/mellanox/mlx5/core/cmd.c
View File

@ -1072,7 +1072,7 @@ static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in,
ds = ent->ts2 - ent->ts1;
op = MLX5_GET(mbox_in, in->first.data, opcode);
if (op < ARRAY_SIZE(cmd->stats)) {
if (op < MLX5_CMD_OP_MAX) {
stats = &cmd->stats[op];
spin_lock_irq(&stats->lock);
stats->sum += ds;
@ -1551,7 +1551,7 @@ static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool force
if (ent->callback) {
ds = ent->ts2 - ent->ts1;
if (ent->op < ARRAY_SIZE(cmd->stats)) {
if (ent->op < MLX5_CMD_OP_MAX) {
stats = &cmd->stats[ent->op];
spin_lock_irqsave(&stats->lock, flags);
stats->sum += ds;
@ -1960,10 +1960,16 @@ int mlx5_cmd_init(struct mlx5_core_dev *dev)
return -EINVAL;
}
cmd->pool = dma_pool_create("mlx5_cmd", dev->device, size, align, 0);
if (!cmd->pool)
cmd->stats = kvzalloc(MLX5_CMD_OP_MAX * sizeof(*cmd->stats), GFP_KERNEL);
if (!cmd->stats)
return -ENOMEM;
cmd->pool = dma_pool_create("mlx5_cmd", dev->device, size, align, 0);
if (!cmd->pool) {
err = -ENOMEM;
goto dma_pool_err;
}
err = alloc_cmd_page(dev, cmd);
if (err)
goto err_free_pool;
@ -1999,7 +2005,7 @@ int mlx5_cmd_init(struct mlx5_core_dev *dev)
spin_lock_init(&cmd->alloc_lock);
spin_lock_init(&cmd->token_lock);
for (i = 0; i < ARRAY_SIZE(cmd->stats); i++)
for (i = 0; i < MLX5_CMD_OP_MAX; i++)
spin_lock_init(&cmd->stats[i].lock);
sema_init(&cmd->sem, cmd->max_reg_cmds);
@ -2046,7 +2052,8 @@ err_free_page:
err_free_pool:
dma_pool_destroy(cmd->pool);
dma_pool_err:
kvfree(cmd->stats);
return err;
}
EXPORT_SYMBOL(mlx5_cmd_init);
@ -2060,6 +2067,7 @@ void mlx5_cmd_cleanup(struct mlx5_core_dev *dev)
destroy_msg_cache(dev);
free_cmd_page(dev, cmd);
dma_pool_destroy(cmd->pool);
kvfree(cmd->stats);
}
EXPORT_SYMBOL(mlx5_cmd_cleanup);

2
drivers/net/ethernet/mellanox/mlx5/core/debugfs.c
View File

@ -171,7 +171,7 @@ void mlx5_cmdif_debugfs_init(struct mlx5_core_dev *dev)
cmd = &dev->priv.cmdif_debugfs;
*cmd = debugfs_create_dir("commands", dev->priv.dbg_root);
for (i = 0; i < ARRAY_SIZE(dev->cmd.stats); i++) {
for (i = 0; i < MLX5_CMD_OP_MAX; i++) {
stats = &dev->cmd.stats[i];
namep = mlx5_command_str(i);
if (strcmp(namep, "unknown command opcode")) {

2
include/linux/mlx5/driver.h
View File

@ -298,7 +298,7 @@ struct mlx5_cmd {
struct mlx5_cmd_debug dbg;
struct cmd_msg_cache cache[MLX5_NUM_COMMAND_CACHES];
int checksum_disabled;
struct mlx5_cmd_stats stats[MLX5_CMD_OP_MAX];
struct mlx5_cmd_stats *stats;
};
struct mlx5_port_caps {