linux-kernel - Re: [PATCH 1/3] Input: db9 - store object at correct index

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Message-ID: <20151002181118.GI8437@dtor-ws>
Date:	Fri, 2 Oct 2015 11:11:18 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH 1/3] Input: db9 - store object at correct index

Hi Sudip,

On Fri, Oct 02, 2015 at 04:58:33PM +0530, Sudip Mukherjee wrote:
> The variable i is used to check the port to attach to and we are
> supposed to save the reference of struct db9 in the location given by
> db9_base[i]. But after finding out the index i is getting modified again
> so we saved in a wrong index.
> 
> Fixes: 2260c419b52b ("Input: db9 - use parallel port device model")
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> ---
>  drivers/input/joystick/db9.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/joystick/db9.c b/drivers/input/joystick/db9.c
> index cf1f602..f6ecd4a 100644
> --- a/drivers/input/joystick/db9.c
> +++ b/drivers/input/joystick/db9.c
> @@ -560,7 +560,7 @@ static void db9_attach(struct parport *pp)
>  	const struct db9_mode_data *db9_mode;
>  	struct pardevice *pd;
>  	struct input_dev *input_dev;
> -	int i, j;
> +	int i, j, k;
>  	int mode;
>  	struct pardev_cb db9_parport_cb;
>  
> @@ -577,6 +577,7 @@ static void db9_attach(struct parport *pp)
>  		pr_debug("Not using parport%d.\n", pp->number);
>  		return;
>  	}
> +	k = i;

Hmm, I'd prefer we did not reuse 'i' at all. Can we instead of 'k' add
'port_idx' and use it instead of 'i' in the first loop?

Thanks.

-- 
Dmitry
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