linux-kernel - RE: [PATCH v2] dmatest: Fix NULL pointer dereference on ioat

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Message-ID: <8D3F6266AEB6384E807C6FFC6FE195E302270D26@BGSMSX101.gar.corp.intel.com>
Date:	Mon, 3 Dec 2012 17:42:00 +0000
From:	"Koul, Vinod" <vinod.koul@...el.com>
To:	viresh kumar <viresh.kumar@...aro.org>, Dan Williams <djbw@...com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Jiang, Dave" <dave.jiang@...el.com>,
	"Mason, Jon" <jon.mason@...el.com>
Subject: RE: [PATCH v2] dmatest: Fix NULL pointer dereference on ioat

> On Wed, Nov 14, 2012 at 8:17 AM, viresh kumar <viresh.kumar@...aro.org> wrote:
> > On Mon, Nov 12, 2012 at 4:33 AM, Jon Mason <jon.mason@...el.com> wrote:
> >> device_control is an optional and not implemented in all DMA drivers.
> >> Any calls to these will result in a NULL pointer dereference.
> >> dmatest makes two of these calls when completing the kernel thread
> >> and removing the module.  These are corrected by calling the
> >> dmaengine_device_control wrapper and checking for a non-existant
> >> device_control function pointer there.
> >>
> >> Signed-off-by: Jon Mason <jon.mason@...el.com>
> >> CC: Vinod Koul <vinod.koul@...el.com>
> >> CC: Dan Williams <djbw@...com>
> 
> > Reviewed-by: Viresh Kumar <viresh.kumar@...aro.org>
Applied, Thanks

--
~Vinod
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