linux-kernel - Re: [PATCH v2] firmware: arm_scmi: Fix to replace of_match

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Message-ID: <59855f4f-9099-a8a9-c8dd-918b5fc637ea@arm.com>
Date:   Mon, 25 Mar 2019 11:08:28 +0000
From:   Steven Price <steven.price@....com>
To:     Aditya Pakki <pakki001@....edu>
Cc:     kjlu@....edu, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH v2] firmware: arm_scmi: Fix to replace of_match_device

On 22/03/2019 21:55, Aditya Pakki wrote:
> of_match_device can return NULL if no matching device is found.
> This patch replaces the function with of_device_get_match_data.
> and returns -EINVAL in such a scenario.
> 
> Signed-off-by: Aditya Pakki <pakki001@....edu>

Reviewed-by: Steven Price <steven.price@....com>

> 
> ---
> v1: Replace of_match_device with of_device_get_match_data
> ---
>  drivers/firmware/arm_scmi/driver.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
> index 8f952f2f1a29..a44852a1d5bc 100644
> --- a/drivers/firmware/arm_scmi/driver.c
> +++ b/drivers/firmware/arm_scmi/driver.c
> @@ -798,7 +798,9 @@ static int scmi_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> -	desc = of_match_device(scmi_of_match, dev)->data;
> +	desc = of_device_get_match_data(dev);
> +	if (!desc)
> +		return -EINVAL;
>  
>  	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
>  	if (!info)
>