linux-kernel - Re: [PATCH] Input: automatically set EV_ABS bit in input_set_abs

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Date:	Fri, 10 Oct 2014 13:30:28 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
cc:	linux-input@...r.kernel.org, Henrik Rydberg <rydberg@...omail.se>,
	Hans de Goede <hdegoede@...hat.com>,
	David Herrmann <dh.herrmann@...il.com>,
	Benjamin Tissoires <benjamin.tissoires@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: automatically set EV_ABS bit in
 input_set_abs_params

On Wed, 8 Oct 2014, Dmitry Torokhov wrote:

> Let's automatically set EV_ABS bit in device's event type list when calling
> input_set_abs_params() so that drivers do not have to do it explicitly.
> 
> These calls are never in a hot paths so we won't lose much time by setting
> the same bit several times.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Makes sense.

	Acked-by: Jiri Kosina <jkosina@...e.cz>

Thanks.

> ---
>  drivers/input/input.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/input.c b/drivers/input/input.c
> index 29ca0bb..d2e06cc 100644
> --- a/drivers/input/input.c
> +++ b/drivers/input/input.c
> @@ -498,7 +498,8 @@ void input_set_abs_params(struct input_dev *dev, unsigned int axis,
>  	absinfo->fuzz = fuzz;
>  	absinfo->flat = flat;
>  
> -	dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis);
> +	__set_bit(EV_ABS, dev->evbit);
> +	__set_bit(axis, dev->absbit);
>  }
>  EXPORT_SYMBOL(input_set_abs_params);

-- 
Jiri Kosina
SUSE Labs
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