linux-kernel - Re: [PATCH] phy: qcom: use struct

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Date:   Wed, 8 Dec 2021 20:50:06 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Guo Zhengkui <guozhengkui@...o.com>
Cc:     Andy Gross <agross@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@...r.kernel.org>,
        "open list:GENERIC PHY FRAMEWORK" <linux-phy@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>, kernel@...o.com
Subject: Re: [PATCH] phy: qcom: use struct_size instead of sizeof

On Wed 08 Dec 19:21 PST 2021, Guo Zhengkui wrote:

> Use struct_size() to get the accurate size of `clk_hw_onecell_data`
> with a variable size array, instead of sizeof(data) to get the size
> of a pointer.
> 

Fixes: f199223cb490 ("phy: qcom: Introduce new eDP PHY driver")
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Thanks,
Bjorn

> Suggested-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Signed-off-by: Guo Zhengkui <guozhengkui@...o.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-edp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c
> index 17d5653b661d..a8ecd2e8442d 100644
> --- a/drivers/phy/qualcomm/phy-qcom-edp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-edp.c
> @@ -571,7 +571,7 @@ static int qcom_edp_clks_register(struct qcom_edp *edp, struct device_node *np)
>  	struct clk_init_data init = { };
>  	int ret;
>  
> -	data = devm_kzalloc(edp->dev, sizeof(data), GFP_KERNEL);
> +	data = devm_kzalloc(edp->dev, struct_size(data, hws, 2), GFP_KERNEL);
>  	if (!data)
>  		return -ENOMEM;
>  
> -- 
> 2.20.1
>