linux-kernel - Re: [PATCH 1/2] thermal/of: Add error information printing for devm_thermal_of_zone

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Date:   Wed, 12 Jul 2023 10:51:27 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] thermal/of: Add error information printing for
 devm_thermal_of_zone_register()

Hi Daniel,

On 2023/7/11 20:45, Yangtao Li wrote:
> Ensure that all error handling branches print error information. In this
> way, when this function fails, the upper-layer functions can directly
> return an error code without missing debugging information. Otherwise,
> the error message will be printed redundantly or missing.
>
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>   drivers/thermal/thermal_of.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
> index 6fb14e521197..8ce231f7639a 100644
> --- a/drivers/thermal/thermal_of.c
> +++ b/drivers/thermal/thermal_of.c
> @@ -583,11 +583,14 @@ struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, in
>   
>   	ptr = devres_alloc(devm_thermal_of_zone_release, sizeof(*ptr),
>   			   GFP_KERNEL);
> -	if (!ptr)
> +	if (!ptr) {
> +		dev_err(dev, "Failed to allocate device resource data\n");
>   		return ERR_PTR(-ENOMEM);
> +	}
>   
>   	tzd = thermal_of_zone_register(dev->of_node, sensor_id, data, ops);
>   	if (IS_ERR(tzd)) {
> +		dev_err(dev, "Failed to register thermal zone: %d\n", PTR_ERR(tzd));
>   		devres_free(ptr);
>   		return tzd;
>   	}


Do you agree with the current modification?

Or if you have other opinions, please let me know.

I want to do a cleanup of the code below drivers/thermal this time.


Thx,

Yangtao