Re: snd-cs4236 (possibly all isa-pnp cards or all alsa isa-pnp cards) broken in 2.6.16-rc4

[Rene Herman <rene.herman@keyaccess.nl>]

Takashi Iwai wrote:

> Rene Herman wrote:

> > I noticed on 2.6.16-rc4 that my MPU-401 wasn't functional, due to a
> > simple copy & paste error in sound/isa/cs423x/cs4236.c:
>
> Thanks, I applied it to ALSA CVS tree, too.

The patch Adam sent fixes the ".remove not called" issue. It _also_ 
fixes the OOPS in snd_timer_free() I sent along, so that one wasn't 
independent. During testing, I uncovered one more bug though.

After using aplaymidi (to test cs4236 mpu401), which pulls in 
snd-seq-oss, modprobe -r snd-cs4236 tells me:

"ALSA sound/core/device.c:106: device free eee4e000 (from f099153d), not 
found"

That then stays until reboot, with a different device address each time.

f099153d is snd_opl3_free_seq_oss() here. For now I've stuck a 
dump_stack() in there, which treats me to:

===
 [<f099152e>] snd_opl3_free_seq_oss+0x8/0x20 [snd_opl3_synth]
 [<f099044f>] snd_opl3_seq_delete_device+0x17/0x3c [snd_opl3_synth]
 [<f08f06ec>] free_device+0x4b/0x8e [snd_seq_device]
 [<f08f02da>] snd_seq_device_free+0x88/0xa9 [snd_seq_device]
 [<f09579a2>] snd_device_free+0x8b/0xf0 [snd]
 [<f0957ccd>] snd_device_free_all+0x67/0x7a [snd]
 [<f0953d01>] snd_card_free+0x111/0x1f3 [snd]
 [<c0134464>] zap_pte_range+0x1cf/0x1ec
 [<c026a76e>] wait_for_completion+0xc4/0xdf
 [<c010ea9b>] complete+0x2e/0x5c
 [<c010eaa9>] complete+0x3c/0x5c
 [<f096b7f9>] snd_cs423x_pnpc_remove+0xb/0x14 [snd_cs4236]
 [<c01c148b>] card_remove_first+0x2f/0x4a
 [<c01c1e3d>] pnp_device_remove+0x18/0x2d
 [<c01e149d>] __device_release_driver+0x53/0x6b
 [<c01e156a>] driver_detach+0x91/0xbf
 [<c01e0fac>] bus_remove_driver+0x27/0x41
 [<c01e181b>] driver_unregister+0xb/0x13
 [<c01c1f46>] pnp_unregister_driver+0xb/0x1b
 [<f096b826>] snd_cs423x_unregister_all+0x14/0x36 [snd_cs4236]
 [<c0126529>] sys_delete_module+0x12b/0x155
 [<c0137f6c>] do_munmap+0xe2/0xef
 [<c0137fae>] sys_munmap+0x35/0x4d
 [<c0102551>] syscall_call+0x7/0xb
ALSA sound/core/device.c:106: device free eee4e000 (from f099153d), not 
found
pnp: Device 01:01.03 disabled.
pnp: Device 01:01.02 disabled.
pnp: Device 01:01.00 disabled.
pnp: the driver 'cs4236_isapnp' has been unregistered
===

I'll try and see if I can find anything later, but if you could, please 
beat me to it. I'm not even quite sure what that oss sequencer thing is...

Rene.
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