linux-kernel - Re: [PATCH] NTB: ntb_tool: Add check for devm

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Date:   Mon, 28 Nov 2022 08:37:29 -0700
From:   Dave Jiang <dave.jiang@...el.com>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>, jdmason@...zu.us,
        allenbh@...il.com, error27@...il.com
Cc:     ntb@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] NTB: ntb_tool: Add check for devm_kcalloc



On 11/21/2022 8:32 PM, Jiasheng Jiang wrote:
> As the devm_kcalloc may return NULL pointer,
> it should be better to add check for the return
> value, as same as the others.
> 
> Fixes: 7f46c8b3a552 ("NTB: ntb_tool: Add full multi-port NTB API support")
> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>

Reviewed-by: Dave Jiang <dave.jiang@...el.com>

> ---
>   drivers/ntb/test/ntb_tool.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c
> index 5ee0afa621a9..eeeb4b1c97d2 100644
> --- a/drivers/ntb/test/ntb_tool.c
> +++ b/drivers/ntb/test/ntb_tool.c
> @@ -998,6 +998,8 @@ static int tool_init_mws(struct tool_ctx *tc)
>   		tc->peers[pidx].outmws =
>   			devm_kcalloc(&tc->ntb->dev, tc->peers[pidx].outmw_cnt,
>   				   sizeof(*tc->peers[pidx].outmws), GFP_KERNEL);
> +		if (tc->peers[pidx].outmws == NULL)
> +			return -ENOMEM;
>   
>   		for (widx = 0; widx < tc->peers[pidx].outmw_cnt; widx++) {
>   			tc->peers[pidx].outmws[widx].pidx = pidx;