linux-kernel - Re: [PATCH] scsi: aacraid: rcode is unsigned, so can never be less than zero

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Date:   Tue, 7 Feb 2017 14:37:17 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Adaptec OEM Raid Solutions <aacraid@...rosemi.com>,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: aacraid: rcode is unsigned, so can never be less
 than zero

On Tue, Feb 07, 2017 at 11:27:38AM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The check on rcode >= 0 is always true because rcode is unsigned
> and can never be less than zero.  Remove the redundant check.
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/scsi/aacraid/aachba.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
> index 3b5ddf4..ddfd726 100644
> --- a/drivers/scsi/aacraid/aachba.c
> +++ b/drivers/scsi/aacraid/aachba.c
> @@ -1848,7 +1848,7 @@ int aac_report_phys_luns(struct aac_dev *dev, struct fib *fibptr, int rescan)
>  			FsaNormal, 1, 1, NULL, NULL);
>  
>  	/* analyse data */
> -	if (rcode >= 0 && phys_luns->resp_flag == 2) {

The original code is buggy.  rcode should be an int.

regards,
dan carpenter