Date: Wed, 29 Sep 2004 20:46:56 +0200
From: Gundolf Kiefer <gundolf.kiefer@web.de>
To: Lee Revell <rlrevell@joe-job.com>
Cc: Jens Axboe <axboe@suse.de>, gundolfk@web.de,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: IRQ blocking when reading audio CDs
Message-ID: <20040929184656.GK1100@lilienthal>
Reply-To: gundolfk@web.de
References: <20040926120849.GG3134@lilienthal> <20040927055234.GA2288@suse.de> <1096399282.2852.24.camel@krustophenia.net>
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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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