linux-kernel - Re: [PATCH] Input: atmel_mxt_ts - Remove unnecessary byte

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Message-ID: <20171008194116.GB29090@lava.h.shmanahar.org>
Date:   Sun, 8 Oct 2017 20:41:16 +0100
From:   Nick Dyer <nick@...anahar.org>
To:     Christos Gkekas <chris.gekas@...il.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: atmel_mxt_ts - Remove unnecessary byte_offset
 check

On Sun, Oct 08, 2017 at 07:44:18PM +0100, Christos Gkekas wrote:
> Variable byte_offset is unsigned so checking whether it is greater or
> equal to zero is redundant.
> 
> Signed-off-by: Christos Gkekas <chris.gekas@...il.com>

Yep - looks sensible to me.

Signed-off-by: Nick Dyer <nick@...anahar.org>

> ---
>  drivers/input/touchscreen/atmel_mxt_ts.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
> index 7659bc4..baafaed 100644
> --- a/drivers/input/touchscreen/atmel_mxt_ts.c
> +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
> @@ -1356,7 +1356,7 @@ static int mxt_prepare_cfg_mem(struct mxt_data *data,
>  
>  			byte_offset = reg + i - cfg_start_ofs;
>  
> -			if (byte_offset >= 0 && byte_offset < config_mem_size) {
> +			if (byte_offset < config_mem_size) {
>  				*(config_mem + byte_offset) = val;
>  			} else {
>  				dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
> -- 
> 2.7.4
>