linux-kernel - Re: [PATCH] dmaengine: fix regression introduced by d6103085dfd83c13db65c3bd7e182f021d77c541

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Message-Id: <20090401.102147.40646663.nemoto@toshiba-tops.co.jp>
Date:	Wed, 01 Apr 2009 10:21:47 +0900 (JST)
From:	Atsushi Nemoto <anemo@....ocn.ne.jp>
To:	lg@...x.de
Cc:	linux-kernel@...r.kernel.org, dan.j.williams@...el.com,
	maciej.sosnowski@...el.com
Subject: Re: [PATCH] dmaengine: fix regression introduced by
 d6103085dfd83c13db65c3bd7e182f021d77c541

On Tue, 31 Mar 2009 18:07:34 +0200 (CEST), Guennadi Liakhovetski <lg@...x.de> wrote:
> chan is an index variable, used to loop over a list of channels, and here 
> it is used _after_ the loop, in which case it doesn't point to a DMA 
> channel struct anymore. Dereferencing it leads to a corruption of a random 
> memory location, which in my case was a pointer inside a clock struct. Fix 
> it by using a local variable pointing to the DMA device.
> 
> Signed-off-by: Guennadi Liakhovetski <lg@...x.de>

Oops!  your fix is correct.  Thank you for fixing this nasty bug.

---
Atsushi Nemoto
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