[alsa-devel] [PATCH 00/14] SPDIF support

Mark Brown broonie at kernel.org
Mon Sep 2 18:41:34 CEST 2013

On Mon, Sep 02, 2013 at 03:57:22PM +0100, Russell King - ARM Linux wrote:
> On Mon, Sep 02, 2013 at 03:52:07PM +0100, Russell King - ARM Linux wrote:
> > On Mon, Sep 02, 2013 at 03:47:13PM +0100, Mark Brown wrote:

> > > > This is caused because substream->ops is NULL.  Why that's the case,
> > > > I don't know, but I believe the PCM which is trying to be operated on
> > > > is the one registered against the backend (by snd_pcm_new_internal).

> > > Liam did provide you with a workaround for this one along with a
> > > suggested proper fix.  Have you had any success in using this
> > > workaround, or with implementing the proper fix for that matter?  I
> > > don't recall seeing any feedback on the results but perhaps I missed it.

> > I am not aware of any such patch.

> That was a little hasty - I should say: I have not received any such patch
> and I have nothing which suggests that a solution to this problem was even
> outlined.  (I have checked my mailbox for anything from Liam, of which
> there are a very small number of such mails.)

I was thinking of this:


where Liam suggests setting some ops as a workaround and that the
framework should just check for them before dereferencing otherwise.
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