linux-kernel - Re: [PATCH RESEND 6/6] clk: s5p-g2d: Fix incorrect usage of IS_ERR_OR

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Message-ID: <20130103135256.GO2631@n2100.arm.linux.org.uk>
Date:	Thu, 3 Jan 2013 13:52:56 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Tony Prisk <linux@...sktech.co.nz>,
	Tomasz Stanislawski <t.stanislaws@...sung.com>,
	Dan Carpenter <error27@...il.com>,
	Sergei Shtylyov <sshtylyov@...sta.com>,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Sylwester Nawrocki <sylvester.nawrocki@...il.com>,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [PATCH RESEND 6/6] clk: s5p-g2d: Fix incorrect usage of
	IS_ERR_OR_NULL

On Thu, Jan 03, 2013 at 04:45:54PM +0300, Dan Carpenter wrote:
> On Thu, Jan 03, 2013 at 11:21:02AM +0000, Russell King - ARM Linux wrote:
> > Maybe you don't realise, but IS_ERR(NULL) is false.  Therefore, this falls
> > into category (2).
> 
> No, obviously, I know the difference between IS_ERR() and
> IS_ERR_OR_NULL().  That's how we started this thread.

Well, if you know that, then how is the documentation anything _but_
clear?
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