Please cc me on replies.
I'm running 2.5.40 with a via CLE motherboard with VT8235 southbridge
chip. The alsa driver for 8233 (sound/pci/via8233.c) seems to work fine,
meaning the sound output works as expected. I get lots of kernel messages
like below. A very simple program reproduces the problem:
#include <fcntl.h>
int main(int argc,char **argv)
{
int dsp;
dsp=open("/dev/dsp",O_WRONLY);
close(dsp); // After this we get the kernel errors
}
The following repeats dozens and perhaps hundreds of times. I've worked out
from an objdump -d of vmlinux what the functions in the call stack are, and
their addresses.
Jan 19 13:15:44 test kernel: bad: scheduling while atomic!
Jan 19 13:15:44 test kernel: c5f01bcc c011175e c029d300 000003d9 c0241d9a 00000000 c5f01bfc 0003fbb0
Jan 19 13:15:44 test kernel: 00000026 c118b800 c011d7ae c5f01bfc c035fa10 c035fa10 0003fbb0 c6265920
Jan 19 13:15:44 test kernel: c011d710 c035f480 0003fbaf c5f00000 0003fbaf c5f00000 c02459b9 0200b800
Jan 19 13:15:44 test kernel: Call Trace:
[<c011175e>] schedule = 111720
[<c0241d9a>] snd_via8233_codec_ready=241d80
[<c011d7ae>] schedule_timeout=11d720
[<c011d710>] process_timeout = 11d710
[<c02459b9>] snd_ac97_set_rate=245830
[<c0242359>] snd_via8233_playback_prepare=242330
[<c0233617>] snd_pcm_prepare=233570
[<c0235095>] snd_pcm_common_ioctl1=234ec0
[<c02354b2>] snd_pcm_playback_ioctl1=235160
[<c0235867>] snd_pcm_kernel_playback_ioctl=235840
[<c02294d5>] snd_pcm_oss_prepare=2294c0
[<c0229536>] snd_pcm_oss_make_ready=229500
[<c0229ccb>] snd_pcm_oss_sync=229cb0
[<c013c12e>] chrdev_open=13c0d0
[<c013a74c>] dentry_open=13a74c
[<c022aeeb>] snd_pcm_oss_release=22aed0
[<c013c52b>] __fput=13c500
[<c013ab33>] filp_close=13aa90
[<c013aba1>] sys_close=13ab40
[<c0108e57>] syscall_call=108e50
Here are the configs related to sound:
CONFIG_SOUND=y
CONFIG_SND=y
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_VIA686=y
CONFIG_SND_VIA8233=y
All other sound related configs are unset.
I'm happy to run experiments of someone has any suggestions of what to try.
Thanks!
-Dave