From 894ce2dea5ac39ff53e72d7f58dd8b94fbf6e00e Mon Sep 17 00:00:00 2001 From: Saeed Mahameed Date: Wed, 27 May 2020 23:16:02 -0700 Subject: [PATCH] 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 --- drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 20 +++++++++++++------ .../net/ethernet/mellanox/mlx5/core/debugfs.c | 2 +- include/linux/mlx5/driver.h | 2 +- 3 files changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c index eca159e8e123b..1d91a0d0ab1d7 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -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); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c index d2d57213511be..07c8d9811bc81 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/debugfs.c @@ -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")) { diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 6aa6bbd60559b..13c0e4556eda9 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -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 { -- 2.39.5