Re: IRQ blocking when reading audio CDs

[Gundolf Kiefer]

Ok, I applied Andrew Morton's updated CDROMREADAUDIO DMA patch from Jan 2003 
(http://lwn.net/Articles/19386/) to kernel 2.4.25, and everything seems to 
work fine now.

Thanks, Jens & Lee!


On 2004.09.28 21:21 Lee Revell wrote:
> On Mon, 2004-09-27 at 01:52, Jens Axboe wrote:
> > On Sun, Sep 26 2004, Gundolf Kiefer wrote:
> > > Dear Jens (& Christoph),
> > >
> > > on my media PC (a Pentium II 350 MHz running Debian Woody with Kernel
> > > 2.4.25), I have problems using LIRC 0.6.6 with a serial IR reveiver when
> at
> > > the same time some application (cdparanoia, xmms/Audio CD reader) is
> > > reading audio data from a CD.
> >
> > Upgrade to 2.6, it can use DMA for cdda extraction. If you cannot for
> > some reason, Andrew had an ide-cd hack to enable dma in 2.4 for this.
>
> Seems like it should also work in PIO mode as long as unmask_irq is set.
>
> Lee
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