Re: "Unable to handle kernel paging request" panic in snd-usb-audio on x86_64

[Luke Ross <luke@lukeross.name>]

Hi,

On Fri, Oct 06, 2006 at 03:31:59PM +0200, Takashi Iwai wrote:
>
> According to the stack trace, the problem looks rather like a problem
> of usb-audio driver than the PCM core stuff I've suspected.
> 
> Could you try the patch below?  It's to the latest HG but should be
> applicable to other recent versions, too.

I gave your patch a try, but the problem is still there.

Just for the record, the device in question supports only one rate, 
which is a non-ALSA-standard one. Therefore, needs_knot should be set 
and hence the call to snd_pcm_hw_constraint_list.

As a basic sanity check I did some printk just before the call and 
neither runtime nor fp are null, and fp->nr_rates is 1 as expected. I'm 
happy to try some more printk to try and work out what's going on, but 
still don't quite see why the code/soundcard combination works on i386 
but not x86_64 - could it be arch dependent?

Luke

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