Re: [PATCH v2 6/7] HID: sensor: custom: Register enable attribute after misc device

[Jonathan Cameron <jic23@kernel.org>]

On Wed,  4 Nov 2026 12:14:02 -0800
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> wrote:

> Register the enable_sensor sysfs group only after misc-device setup
> succeeds. This prevents userspace from opening the sensor hub while
> probe can still fail, which would otherwise leave the hub open reference
> unbalanced on unwind.
> 
> Fixes: 4a7de0519df5 ("HID: sensor: Custom and Generic sensor support")
> Reported-by: Семён Марьясин <simeon@maryasin.name>
> Closes: https://lore.kernel.org/all/CAM2dg7ewfVJSP4rFyhkCB1Rmd1+X56sAg=eUdbPthG2xrLqwQQ@mail.gmail.com/
> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
You probably already saw it, but sashiko had more feedback.
https://sashiko.dev/#/patchset/20261104201403.2039921-1-srinivas.pandruvada%40linux.intel.com

I haven't looked closely at it though so might be either wrong
or material for a future patch.

One rather odd looking thing in here though.


> ---
>  drivers/hid/hid-sensor-custom.c | 15 ++++++++-------
>  1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c
> index 4f824cadd370..990e653995e1 100644
> --- a/drivers/hid/hid-sensor-custom.c
> +++ b/drivers/hid/hid-sensor-custom.c
> @@ -1059,20 +1059,21 @@ static int hid_sensor_custom_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto err_remove_callback;
>  
> -	ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
> -				 &enable_sensor_attr_group);
> +	ret = hid_sensor_custom_dev_if_add(sensor_inst);
>  	if (ret)
>  		goto err_remove_attributes;
>  
> -	ret = hid_sensor_custom_dev_if_add(sensor_inst);
> +	ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
> +				 &enable_sensor_attr_group);
>  	if (ret)
> -		goto err_remove_group;
> +		goto err_remove_dev_if;
>  
>  	return 0;
>  
> -err_remove_group:
> -	sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
> -			   &enable_sensor_attr_group);
> +err_remove_dev_if:
> +	sensor_hub_remove_callback(hsdev, hsdev->usage);
> +	hid_sensor_custom_dev_if_remove(sensor_inst);
> +	goto err_remove_attributes;

If my eyes are tricking me, isn't this going to the next line?

>  err_remove_attributes:
>  	hid_sensor_custom_remove_attributes(sensor_inst);
>  err_remove_callback: