linux-kernel - Re: [PATCH 3/8] interconnect: imx: fix max_node

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Date:   Sat, 4 Jun 2022 03:14:19 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     djakov@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        festevam@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, abel.vesa@....com,
        abailon@...libre.com, l.stach@...gutronix.de, marex@...x.de,
        paul.elder@...asonboard.com, Markus.Niebel@...tq-group.com,
        aford173@...il.com, kernel@...gutronix.de,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH 3/8] interconnect: imx: fix max_node_id

Hi Peng,

Thank you for the patch.

On Wed, Jun 01, 2022 at 05:41:51PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> max_node_id not equal to the ARRAY_SIZE of node array, need increase 1,
> otherwise xlate will fail for the last entry.
> 
> Fixes: f0d8048525d7d("interconnect: Add imx core driver")
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/interconnect/imx/imx.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/interconnect/imx/imx.c b/drivers/interconnect/imx/imx.c
> index 249ca25d1d55..3c074933ed0c 100644
> --- a/drivers/interconnect/imx/imx.c
> +++ b/drivers/interconnect/imx/imx.c
> @@ -238,7 +238,7 @@ int imx_icc_register(struct platform_device *pdev,
>  	int ret;
>  
>  	/* icc_onecell_data is indexed by node_id, unlike nodes param */
> -	max_node_id = get_max_node_id(nodes, nodes_count);
> +	max_node_id = get_max_node_id(nodes, nodes_count) + 1;

I'd rename the max_node_id variable to num_nodes, as writing

	max_node_id = get_max_node_id(...) + 1;

looks weird.

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

>  	data = devm_kzalloc(dev, struct_size(data, nodes, max_node_id),
>  			    GFP_KERNEL);
>  	if (!data)

-- 
Regards,

Laurent Pinchart