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

[Dmitry Torokhov]

Hi Mark,

On Wed, Aug 05, 2026 at 10:51:53AM -0400, Mark Pearson wrote:
> 
> 
> 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.

If that is desired the whole driver needs converting. I can do it in a
separate patch(es) if you want.

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

Thanks.

-- 
Dmitry