linux-kernel - Re: [PATCH 9/9] drivers/isdn/gigaset/common.c: Remove useless kfree

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Message-ID: <CA+MoWDqiudaBC=sLUuQABTZHp2yUTVB+RY73no8s61fsG7vaZQ@mail.gmail.com>
Date:	Thu, 13 Sep 2012 11:27:49 +0200
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	David Laight <David.Laight@...lab.com>
Cc:	Hansjoerg Lipp <hjlipp@....de>, kernel-janitors@...r.kernel.org,
	Tilman Schmidt <tilman@...p.cc>,
	Karsten Keil <isdn@...ux-pingi.de>,
	gigaset307x-common@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 9/9] drivers/isdn/gigaset/common.c: Remove useless kfree

> Seems to me that (assuming kfree(NULL) is ok) the kfree()
> is best left in - just in case some other error path is
> added after drv->cs is assigned.
> Better safe than a memory leak.

I'm not sure if I got your point. Now the label "error:" is only
reached if drv->cs is NULL. There is not other way to move to error:
unless drv->cs is NULL. Why wouldn't be safe to remove the
kfree(drv->cs) when drv->cs is NULL?


-- 
Peter
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