Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 12 Apr 2010 14:32:38 +0200 | From | Daniel Mack <> | Subject | Re: USB transfer_buffer allocations on 64bit systems |
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On Mon, Apr 12, 2010 at 02:12:43PM +0200, Andi Kleen wrote: > > I'm not putting into question whether something is broken in my > > system, but if it is, it must be the ICH9 platform, because I was able > > to reproduce it in another laptop. > > > > My laptop is a Lenovo T400 and I was able to reproduce it in a Acer > > Aspire 59xx (I don't remember the exact model, but it is one of the > > new ones with 15.6 inch - i think they all use the same base). And the > > common thing between them is the ICH9 platform. > > There are lots of systems around with ICH9 that work fine. > I'm typing on one.
FWIW, the fix that made it work for Pedro was to use usb_buffer_alloc() for the transfer_buffer of the audio module.
Another detail I can't explain is that on his machine, the kernel oopses when kmalloc() with GFP_DMA32 is used. The patch to try this also only touched the allocation in sound/usb/caiaq/audio.c.
> > The only which solved this problem was the first patch sent to me by > > Daniel Mack. I've been using it for days straight and it works fine. > > Can you send a full boot log?
He just did. I put it online here:
http://caiaq.de/download/tmp/pedro-dmesg
Daniel
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