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

[Guennadi Liakhovetski]

On Wed, 5 Jun 2013, Will Deacon wrote:

> 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.

Not from me, no. I just expressed a doubt, the author thinks there is no 
problem, and I have no capacity atm to try to verify it, so, my query 
shouldn't be considered a nak.

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/