linux-kernel - Re: [patch] tracing: Remove an unneeded check

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Message-ID: <20120420140348.GQ6498@mwanda>
Date:	Fri, 20 Apr 2012 17:03:48 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] tracing: Remove an unneeded check

On Fri, Apr 20, 2012 at 09:51:21AM -0400, Steven Rostedt wrote:
> On Fri, 2012-04-20 at 09:31 +0300, Dan Carpenter wrote:
> > memcpy() returns a pointer to "bug".  Hopefully, it's not NULL here or
> > we would already have Oopsed.
> 
> You're right that the ret is useless, and the real bug was already fixed
> (the possibility that buf could be an invalid pointer).
> 
> Not only is this needed, but also get rid of the ret < 0 check in
> tracing_splice_read_pipe().
> 

We still return -EBUSY so we need the check.

regards,
dan carpenter

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