linux-kernel - Re: [PATCH] drivers/mmc/card/block.c: fix potential null dereference 'idata'

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Date:	Tue, 10 May 2011 09:57:27 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	Vladimir Motyka <vladimir.motyka@...il.com>, cjb@...top.org,
	kernel-janitors@...r.kernel.org, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/mmc/card/block.c: fix potential null dereference
 'idata'

On Tue, 10 May 2011, Andy Shevchenko wrote:

> On Mon, May 9, 2011 at 7:12 PM, Julia Lawall <julia@...u.dk> wrote:
> > I guess there is also a point at which idata has been successfully
> > allocated but idata->buf has not.
> And? kfree() simple ignores NULL pointers.

Unnecessarily calling a function suggests that calling that function is 
necessary when it is not.  But it is probably not a big deal, especially 
for a well known function like kfree.

julia

> I would prefer to see previous version of patch, but let maintainer to choose.
> 
> -- 
> With Best Regards,
> Andy Shevchenko
> 
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