Re: [PATCH] iio: accel: kxcjk-1013: disable autosuspend on remove

[Matti Vaittinen]

On 14/09/2026 14:20, Guangshuo Li wrote:
> kxcjk1013_probe() enables runtime PM autosuspend with
> pm_runtime_use_autosuspend(). The probe error path correctly undoes
> this setting with pm_runtime_dont_use_autosuspend(), but the normal
> remove path only disables runtime PM.
>
> The runtime PM API requires pm_runtime_use_autosuspend() to be undone
> with pm_runtime_dont_use_autosuspend() at driver exit unless runtime PM
> was enabled with devm_pm_runtime_enable(). Leaving the autosuspend flag
> set therefore leaves the runtime PM state incompletely cleaned up after
> the driver is unbound.
>
> Add the missing pm_runtime_dont_use_autosuspend() call to the remove
> path.
>
> This issue was found by manual code inspection.
>
> Fixes: 124e1b1d0924 ("iio: accel: kxcjk-1013: support runtime pm")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
> ---
>   drivers/iio/accel/kxcjk-1013.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
> index 166fb786425f..c6b030f64be1 100644
> --- a/drivers/iio/accel/kxcjk-1013.c
> +++ b/drivers/iio/accel/kxcjk-1013.c
> @@ -1547,6 +1547,7 @@ static void kxcjk1013_remove(struct i2c_client *client)
>   
>   	iio_device_unregister(indio_dev);
>   
> +	pm_runtime_dont_use_autosuspend(&client->dev);
>   	pm_runtime_disable(&client->dev);
>   	pm_runtime_set_suspended(&client->dev);
>   

I am not sure if it matters, but it bugs me a bit to see that the 
clean-up path for PM here, and clean-up path at probe error, do still 
not have same steps. As far as I see the probe error path omits the 
pm_runtime_set_suspended(). Do you think this should/could be fixed?

Oh, and if it is fine as it is - I would really appreciate education as 
to why :)

Other than that:

Reviewed-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>

(I know I am late with the tag as Jonathan applied this already - I 
suppose it's still Ok to say I am "Ok" with the fix :] )

Yours,
	-- Matti

--
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland

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