linux-kernel - Re: [PATCH v4 10/14] Input: mt: add input_mt_is

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Message-ID: <20121114171605.GA1033@polaris.bitmath.org>
Date:	Wed, 14 Nov 2012 18:16:05 +0100
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Benjamin Tissoires <benjamin.tissoires@...il.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Stephane Chatty <chatty@...c.fr>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 10/14] Input: mt: add input_mt_is_used

On Wed, Nov 14, 2012 at 04:59:22PM +0100, Benjamin Tissoires wrote:
> This patch extracts the test (slot->frame == mt->frame) so that it can
> be used in third party drivers.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...il.com>
> ---
>  drivers/input/input-mt.c | 2 +-
>  include/linux/input/mt.h | 6 ++++++
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c
> index c0ec7d4..475b9d4 100644
> --- a/drivers/input/input-mt.c
> +++ b/drivers/input/input-mt.c
> @@ -247,7 +247,7 @@ void input_mt_sync_frame(struct input_dev *dev)
>  
>  	if (mt->flags & INPUT_MT_DROP_UNUSED) {
>  		for (s = mt->slots; s != mt->slots + mt->num_slots; s++) {
> -			if (s->frame == mt->frame)
> +			if (input_mt_is_used(mt, s))
>  				continue;
>  			input_mt_slot(dev, s - mt->slots);
>  			input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1);
> diff --git a/include/linux/input/mt.h b/include/linux/input/mt.h
> index cc5cca7..2e86bd0 100644
> --- a/include/linux/input/mt.h
> +++ b/include/linux/input/mt.h
> @@ -69,6 +69,12 @@ static inline bool input_mt_is_active(const struct input_mt_slot *slot)
>  	return input_mt_get_value(slot, ABS_MT_TRACKING_ID) >= 0;
>  }
>  
> +static inline bool input_mt_is_used(const struct input_mt *mt,
> +				    const struct input_mt_slot *slot)
> +{
> +	return slot->frame == mt->frame;
> +}
> +
>  int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots,
>  			unsigned int flags);
>  void input_mt_destroy_slots(struct input_dev *dev);
> -- 
> 1.8.0
> 

    Reviewed-by: Henrik Rydberg <rydberg@...omail.se>

Thanks,
Henrik
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