From: "Joachim Förster" <mls.JOFT@gmx.de>
To: linuxppc-embedded@ozlabs.org
Subject: Re: BUG-REPORT Re: ml403 ac97 driver
Date: Thu, 09 Aug 2007 19:01:42 +0200 [thread overview]
Message-ID: <1186678902.16797.18.camel@localhost> (raw)
In-Reply-To: <11922613.post@talk.nabble.com>
Hi Qin Lin,
sorry for my late answer.
On Tue, 2007-07-31 at 04:49 -0700, Qin Lin wrote:
> When i used the aplay to test the drive first time,it played well. But
> after restart the board
> it is not well again.
Well, I don't think the problem occurs due to the restart of your
board ...
> # aplay yonggan.wav
> Playing WAVE 'yonggan.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
> Stereo
> [ 258.518119] Kernel stack overflow in process c039ec00, r1=c3e0bf50
... but unfortunately I can't tell how such an error results from the
driver. Are you able to reproduce it?
Since the driver "works", I never got such an error nor another kernel
panic/error.
[The only thing that comes to my mind is the very high interrupt volume,
because of the very small size (32 byte) of the playback FIFO (of the
AC97 controller) => hardware issue. But, since interrupts are _disabled_
during execution of interrupt handlers, I am sure that this cannot be
the source of the problem.]
Joachim
prev parent reply other threads:[~2007-08-09 17:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <28652204.1477431184843737431.JavaMail.nabble@isper.nabble.com>
[not found] ` <1184918815.5886.13.camel@localhost>
[not found] ` <2ec96d6e0707280204k50efb707q99a824c37f539309@mail.gmail.com>
2007-07-29 8:48 ` ml403 ac97 driver Joachim Förster
2007-07-29 12:50 ` aq
2007-07-30 5:40 ` Qin Lin
2007-07-30 7:33 ` Joachim Förster
2007-07-30 8:28 ` Qin Lin
2007-07-31 4:22 ` Qin Lin
2007-07-31 7:50 ` Joachim Förster
2007-07-31 11:49 ` BUG-REPORT " Qin Lin
2007-08-09 17:01 ` Joachim Förster [this message]
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