Sound class oops

Hi,

I applied the sound class patches ([email protected] and [email protected] at linuxusb.bkbits.net/usb-2.5) to plain 2.6.0-test11, and noticed that it started oopsing when reloading the ALSA drivers (after an initial successful load/unload). On plain -test11 reloading the modules works fine.

The modules loaded (by the Debian ALSA init script) are:

% lsmod | egrep 's(ou)?nd'

snd_maestro3           21508  0 
snd_ac97_codec         52452  1 snd_maestro3
snd_pcm                88036  1 snd_maestro3
snd_page_alloc          9092  1 snd_pcm
snd_timer              21412  1 snd_pcm
snd                    44292  5 snd_mixer_oss,snd_maestro3,snd_ac97_codec,snd_pcm,snd_timer
soundcore               8224  3 snd_pcm,snd

Here's the oops output:

Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
d08df373
*pde = 00000000
Oops: 0000 [#1]
CPU:    0
EIP:    0060:[<d08df373>]    Not tainted
EFLAGS: 00010293

EIP is at snd_timer_dev_register+0x73/0x110 [snd_timer]
eax: 00000002 ebx: 00000000 ecx: cf65e490 edx: 00000000
esi: cf65e3ac edi: cf65e400 ebp: 00000000 esp: cb5f7dd8
ds: 007b es: 007b ss: 0068
Process modprobe (pid: 2793, threadinfoË5f6000 taskË9f6140)

Stack: 00000003 ced3a340 d08df300 cf65e200 cf65e344 d08ea31e ced3a340 cef43ca0 
       cf65e200 d0a46954 cf65e600 cf65e400 d0a484fc 00000000 00000000 00000002 
       cf65e400 00000003 00000000 00000000 00000000 00000002 cf65e344 c01f7c63 
Call Trace:
 [<d08df300>] snd_timer_dev_register+0x0/0x110 [snd_timer]
 [<d08ea31e>] snd_device_register+0x6e/0x80 [snd]
 [<d0a46954>] snd_pcm_timer_init+0x144/0x190 [snd_pcm]
 [<c01f7c63>] class_device_create_file+0x23/0x30
 [<d0a3b6c8>] snd_pcm_dev_register+0x148/0x1f0 [snd_pcm]
 [<d08ea37b>] snd_device_register_all+0x4b/0x60 [snd]
 [<d08e6140>] snd_card_register+0x20/0x120 [snd]
 [<c01b5d3f>] sprintf+0x1f/0x30
 [<d090e73c>] snd_m3_probe+0x13c/0x1c0 [snd_maestro3]
 [<c01baac2>] pci_device_probe_static+0x52/0x70
 [<c01bab1c>] __pci_device_probe+0x3c/0x50
 [<c01bab5c>] pci_device_probe+0x2c/0x50
 [<c01f724f>] bus_match+0x3f/0x70
 [<c01f737c>] driver_attach+0x5c/0xa0
 [<c01f7643>] bus_add_driver+0x93/0xb0
 [<c01f7a7f>] driver_register+0x2f/0x40
 [<c01bad4c>] pci_register_driver+0x5c/0x90
 [<d0864013>] alsa_card_m3_init+0x13/0x4d [snd_maestro3]
 [<c0133979>] sys_init_module+0x119/0x230
 [<c01093d9>] sysenter_past_esp+0x52/0x71

Code: 8b 03 89 d9 89 c3 0f 18 00 90 81 f9 24 31 8e d0 75 db 89 8f 

The relevant bits of the kernel config are:

CONFIG_SOUND=m
CONFIG_SND=m
CONFIG_SND_SEQUENCER=m
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=m
CONFIG_SND_VIRMIDI=m
CONFIG_SND_SERIAL_U16550=m
CONFIG_SND_MAESTRO3=m
CONFIG_SND_USB_AUDIO=m

ilmari



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Yeah, I'm getting odd oopses too. I'll be working on fixing up the sound class patches next week. Sorry about this.

greg k-h

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