On 7/25/05, Adrian Bunk <[email protected]> wrote:
> Does the OSS driver work in 2.6?
I was able to get the OSS module (opl3sa2) installed in 2.6 and I was
able to get some nice hiss when doing 'cat /dev/urandom > /dev/dsp'. I
used the following modprobe line:
modprobe opl3sa2 io=0x370 irq=11 dma=0 dma2=1 mss_io=0x530 isapnp=0
the isapnp=0 part appeared to be required. The following showed up in
dmesg upon inserting the OSS module:
opl3sa2: Chipset version = 0x7
opl3sa2: Found OPL3-SA3 (YMF715E or YMF719E)
However, when I try to rmmod the opl3sa2 module, I get an Oops:
Unable to handle kernel NULL pointer dereference at virtual address 00000000
printing eip:
c037ae01
*pde = 00000000
Oops: 0002 [#1]
PREEMPT
Modules linked in: opl3sa2 ad1848 mpu401 sound soundcore vfat fat
sd_mod usb_storage lp parport ide_scsi rtc
CPU: 0
EIP: 0060:[<c037ae01>] Not tainted VLI
EFLAGS: 00010046 (2.6.12.2)
EIP is at wait_for_completion+0x71/0xf0
eax: cca91180 ebx: c52ea000 ecx: c52ebf20 edx: 00000000
esi: c52ea000 edi: cca9117c ebp: c52ebf40 esp: c52ebef4
ds: 007b es: 007b ss: 0068
Process rmmod (pid: 11277, threadinfo=c52ea000 task=c79ce550)
Stack: 00000000 c79ce550 c0113cf0 00000000 00000000 c52ea000 c0e899e0 c0209ffe
00000001 c79ce550 c0113cf0 cca91180 00000114 00000001 00000000 cca91174
00000114 00000001 00000000 c52ea000 cca8f964 cca91174 00000000 cca91200
Call Trace:
[<c0113cf0>] default_wake_function+0x0/0x20
[<c0209ffe>] kobject_put+0x1e/0x30
[<c0113cf0>] default_wake_function+0x0/0x20
[<cca8f964>] cleanup_opl3sa2+0x74/0x8c [opl3sa2]
[<c0131bc8>] sys_delete_module+0x178/0x1b0
[<c015b2c0>] sys_munmap+0x50/0x80
[<c0103205>] syscall_call+0x7/0xb
Code: 00 00 8b 03 c7 45 d4 01 00 00 00 c7 45 bc f0 3c 11 c0 c7 45 dc
f0 3c 11 c0 89 45 b8 89 45 d8 8d 47 04 8b 50 04 89 45 e0 89 48 04 <89>
0a 89 55 e4 8d 76 00 8d bc 27 00 00 00 00 8b 03 c7 00 02 00
<6>note: rmmod[11277] exited with preempt_count 1
and now when I try to rmmod the module again, I get:
ERROR: Removing 'opl3sa2': Device or resource busy
So, yes, given the correct parameters, the OSS module (just like the
ALSA module) works with the occasional Oops. I guess the Oopses are
acceptable for now; it's the ALSA detection routines that are broken
themselves or that are broken by something in the 2.6 kernel (remember
that they work fine in 2.4).
Thanks.
-Andy
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