Re: [PATCH] platform/x86: thinkpad_acpi: Use input_device_enabled()

[Mark Pearson]

On Wed, Aug 5, 2026, at 12:03 AM, Dmitry Torokhov wrote:
> From: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
>
> Use the new helper. Inspecting input device's 'users' member needs to be
> done under device's mutex, so add appropriate invocations.
>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
> Acked-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/20200608112211.12125-7-andrzej.p@xxxxxxxxxxxxx
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
> ---
>
> Not sure how this got stuck in my patch queue but it is still valid...
>
>  drivers/platform/x86/lenovo/thinkpad_acpi.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/lenovo/thinkpad_acpi.c 
> b/drivers/platform/x86/lenovo/thinkpad_acpi.c
> index 445e1403308e..f8e116e8a65d 100644
> --- a/drivers/platform/x86/lenovo/thinkpad_acpi.c
> +++ b/drivers/platform/x86/lenovo/thinkpad_acpi.c
> @@ -2547,9 +2547,10 @@ static void hotkey_poll_setup(const bool 
> may_warn)
> 
>  	lockdep_assert_held(&hotkey_mutex);
> 
> +	mutex_lock(&tpacpi_inputdev->mutex);
>  	if (hotkey_poll_freq > 0 &&
>  	    (poll_driver_mask ||
> -	     (poll_user_mask && tpacpi_inputdev->users > 0))) {
> +	     (poll_user_mask && input_device_enabled(tpacpi_inputdev)))) {
>  		if (!tpacpi_hotkey_task) {
>  			tpacpi_hotkey_task = kthread_run(hotkey_kthread,
>  					NULL, TPACPI_NVRAM_KTHREAD_NAME);
> @@ -2566,6 +2567,7 @@ static void hotkey_poll_setup(const bool may_warn)
>  				  poll_user_mask, poll_driver_mask);
>  		}
>  	}
> +	mutex_unlock(&tpacpi_inputdev->mutex);
>  }
> 
>  static void hotkey_poll_setup_safe(const bool may_warn)
> -- 

Looks good to me.

Only note is that can you use guard(mutex)(&tpacpi_inputdev->mutex) instead of the lock/unlock? I think that's preferred these days.

Reviewed-by: Mark Pearson <mpearson-lenovo@xxxxxxxxx>