linux-kernel - Re: [PATCH -next] slimbus: qcom-ngd: Add error handling in of_qcom_slim_ngd

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Date:   Tue, 20 Sep 2022 15:32:03 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Lin Yujun <linyujun809@...wei.com>, agross@...nel.org,
        bjorn.andersson@...aro.org, konrad.dybcio@...ainline.org,
        srinivas.kandagatla@...aro.org, gregkh@...uxfoundation.org,
        vkoul@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] slimbus: qcom-ngd: Add error handling in
 of_qcom_slim_ngd_register

On 14/09/2022 05:19, Lin Yujun wrote:
> No error handling is performed when platform_device_add()
> return fails. Refer to the error handling of driver_set_override(),
> add error handling for platform_device_add().
> 
> Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver")
> Signed-off-by: Lin Yujun <linyujun809@...wei.com>
> ---
>   drivers/slimbus/qcom-ngd-ctrl.c | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
> index 0aa8408464ad..fb591990ddad 100644
> --- a/drivers/slimbus/qcom-ngd-ctrl.c
> +++ b/drivers/slimbus/qcom-ngd-ctrl.c
> @@ -1470,7 +1470,13 @@ static int of_qcom_slim_ngd_register(struct device *parent,
>   		ngd->pdev->dev.of_node = node;
>   		ctrl->ngd = ngd;
>   
> -		platform_device_add(ngd->pdev);
> +		ret = platform_device_add(ngd->pdev);
> +		if (ret) {
> +			platform_device_put(ngd->pdev);
> +			kfree(ngd);
> +			of_node_put(node);
> +			return ret;
> +		}
>   		ngd->base = ctrl->base + ngd->id * data->offset +
>   					(ngd->id - 1) * data->size;
>   

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>