Re: [RFC 0/2] McBSP and ASoC OMAP update patches for 2430 and 34xx

[Felipe Balbi <me@felipebalbi.com>]

On Mon, Aug 25, 2008 at 04:34:40PM -0700, Steve Sakoman wrote:
> > can you also apply this other patch:
> >
> > diff --git a/sound/core/pcm.c b/sound/core/pcm.c
> 
> That patch didn't seem to have an effect, pretty much the same crash:

Hmm... so more investigation is needed but now is already too late for
me, it's past 3am :-p

If Jarkko doesn't get a fix before me (I'm pretty sure he will :-p) I'll
try to dig more when I wake up.

But the problems seems to be on the file open() path. Try to track down
the use of struct snd_pcm_substream, starting at
pcm_native.c:snd_pcm_open_file().

Put some printks around that function and see when substream is getting
nulled.

Something like:

printk(KERN_INFO "%s %d substream %p\n", __func__, __LINE__, substream);

And go down the functional calls following the ones that have a struct
snd_pcm_substream as argument. That will probably allow you to see where
substream is getting NULLed and try to guess a fix for that.

-- 
balbi