linux-kernel - Re: [PATCH] Input: fix defuzzing logic

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Message-ID: <CANq1E4QWcngK8VeEcKzx-5XqUan3kBRKjk7HXjE_SRV+9Umb5g@mail.gmail.com>
Date:	Sun, 20 Jul 2014 11:50:55 +0200
From:	David Herrmann <dh.herrmann@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	"open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
	Benson Leung <bleung@...omium.org>,
	Andrew de los Reyes <adlr@...omium.org>,
	Henrik Rydberg <rydberg@...omail.se>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Input: fix defuzzing logic

Hi

On Sun, Jul 20, 2014 at 1:49 AM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> We attempt to remove noise from coordinates reported by devices in
> input_handle_abs_event(), unfortunately, unless we were dropping the
> event altogether, we were ignoring the adjusted value and were passing
> on the original value instead.

Reviewed-by: David Herrmann <dh.herrmann@...il.com>

Thanks
David

> Reviewed-by: Andrew de los Reyes <adlr@...omium.org>
> Reviewed-by: Benson Leung <bleung@...omium.org>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>  drivers/input/input.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/input/input.c b/drivers/input/input.c
> index 1c4c0db..29ca0bb 100644
> --- a/drivers/input/input.c
> +++ b/drivers/input/input.c
> @@ -257,9 +257,10 @@ static int input_handle_abs_event(struct input_dev *dev,
>  }
>
>  static int input_get_disposition(struct input_dev *dev,
> -                         unsigned int type, unsigned int code, int value)
> +                         unsigned int type, unsigned int code, int *pval)
>  {
>         int disposition = INPUT_IGNORE_EVENT;
> +       int value = *pval;
>
>         switch (type) {
>
> @@ -357,6 +358,7 @@ static int input_get_disposition(struct input_dev *dev,
>                 break;
>         }
>
> +       *pval = value;
>         return disposition;
>  }
>
> @@ -365,7 +367,7 @@ static void input_handle_event(struct input_dev *dev,
>  {
>         int disposition;
>
> -       disposition = input_get_disposition(dev, type, code, value);
> +       disposition = input_get_disposition(dev, type, code, &value);
>
>         if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event)
>                 dev->event(dev, type, code, value);
>
> --
> Dmitry
--
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