[RESEND 1/9] thermal/hwmon: Add error information printing for devm_thermal_add_hwmon_sysfs()

[Daniel Lezcano]

On 13/06/2023 11:56, 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 at vivo.com>
> ---
> Resend patchset so that the changes to thermal/hwmon.c are copied to everyone.
>   drivers/thermal/thermal_hwmon.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/thermal_hwmon.c b/drivers/thermal/thermal_hwmon.c
> index fbe55509e307..a580add5a2f6 100644
> --- a/drivers/thermal/thermal_hwmon.c
> +++ b/drivers/thermal/thermal_hwmon.c
> @@ -271,11 +271,14 @@ int devm_thermal_add_hwmon_sysfs(struct device *dev, struct thermal_zone_device
>   
>   	ptr = devres_alloc(devm_thermal_hwmon_release, sizeof(*ptr),
>   			   GFP_KERNEL);
> -	if (!ptr)
> +	if (!ptr) {
> +		dev_err(dev, "Failed to allocate device resource data\n");
>   		return -ENOMEM;
> +	}

When an allocation fails, there is a callstack showed. It is not 
necessary to print an error in this case.

>   
>   	ret = thermal_add_hwmon_sysfs(tz);
>   	if (ret) {
> +		dev_err(dev, "Failed to add hwmon sysfs attributes\n");
>   		devres_free(ptr);
>   		return ret;
>   	}

That should not display an error. The call site will take care of that.

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