Re: [PATCH] dmatest: do not allow to interrupt ongoing tests

From: Will Deacon
Date: Wed Jun 05 2013 - 13:11:00 EST

On Mon, May 27, 2013 at 08:11:07AM +0100, Andy Shevchenko wrote:
> On Fri, 2013-05-24 at 23:55 +0200, Guennadi Liakhovetski wrote:
> > On Thu, 23 May 2013, Andy Shevchenko wrote:
> >
> > > When user interrupts ongoing transfers the dmatest may end up with console
> > > lockup, oops, or data mismatch. This patch prevents user to abort any ongoing
> > > test.
> >
> > Personally I would be against such a change. What about interrupting the
> > test with rmmod?
> > Is it still possible after this your patch or not? If not
> > - this doesn't seem like a good idea to me. Why don't we just fix those
> > bugs, that you're describing?
> The behaviour of the module is returned to the same page by this patch
> as it was before (w/o debugfs).
> The user can interrupt tests by rmmod, but it will take time up to
> timeout.
> I appreciate if you can do a deeper analysis of what happened in
> case Will reported.

Did this query hold up the application of this patch? I'd really like to see
*something* in 3.10, otherwise dmatest will be broken.

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