linux-kernel - Re: [PATCH 4/8] [media] videobuf-dma-sg: Adjust 24 checks for null values

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Message-ID: <20170109103020.GB4239@mwanda>
Date:   Mon, 9 Jan 2017 13:30:20 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-media@...r.kernel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Jan Kara <jack@...e.cz>,
        Javier Martinez Canillas <javier@....samsung.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Lorenzo Stoakes <lstoakes@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michal Hocko <mhocko@...e.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 4/8] [media] videobuf-dma-sg: Adjust 24 checks for null
 values

On Mon, Dec 26, 2016 at 09:48:19PM +0100, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Mon, 26 Dec 2016 20:30:19 +0100
> 
> Convert comparisons with the preprocessor symbol "NULL" or the value "0"
> to condition checks without it.

Generally lengths are numbers and not booleans so "len == 0" is ok.
Checkpatch doesn't complain about that.

regards,
dan carpenter