Bug 6182
| Summary: | Unplug of USB sound card while in use causes oops | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Pavel Machek (pavel) |
| Component: | Sound(ALSA) | Assignee: | Jaroslav Kysela (perex) |
| Status: | CLOSED CODE_FIX | ||
| Severity: | normal | CC: | greg, tiwai |
| Priority: | P2 | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.16-rc5-git | Subsystem: | |
| Regression: | --- | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 5089 | ||
remove_proc_entry: asound/card1 busy, count=1
Unable to handle kernel paging request at virtual address 6b6b6c6b
printing eip:
c016c3a5
*pde = 00000000
ipw2200: Firmware error detected. Restarting.
ipw2200: Sysfs 'error' log already exists.
BUG: soft lockup detected on CPU#0!
Pid: 2131, comm: mpg123
EIP: 0060:[<c0112024>] CPU: 0
EIP is at delay_pmtmr+0x14/0x20
EFLAGS: 00000293 Not tainted (2.6.16-rc5-g8189a9ba-dirty #233)
EAX: 1e828398 EBX: 001b4437 ECX: 1e757d80 EDX: 00000ac3
ESI: 00000000 EDI: 00030001 EBP: f7582810 DS: 007b ES: 007b
CR0: 8005003b CR2: 6b6b6c6b CR3: 3480f000 CR4: 00000690
[<c0269859>] __delay+0x9/0x10
[<c011e19b>] do_page_fault+0x2fb/0x5d8
[<c011dea0>] do_page_fault+0x0/0x5d8
[<c0103c6b>] error_code+0x4f/0x54
[<c04b007b>] snd_pcm_oss_change_params+0xdb/0xb90
[<c016c3a5>] __fput+0xc5/0x190
[<c0169417>] filp_close+0x47/0x90
[<c0103169>] syscall_call+0x7/0xb
Oops: 0002 [#1]
PREEMPT SMP
Modules linked in: ipw2200
CPU: 0
EIP: 0060:[<c016c3a5>] Not tainted VLI
EFLAGS: 00010246 (2.6.16-rc5-g8189a9ba-dirty #233)
EIP is at __fput+0xc5/0x190
eax: 6b6b6c6b ebx: 6b6b6b6b ecx: 00000001 edx: f4fb2000
esi: f74fb800 edi: f5ac19a8 ebp: f481baf0 esp: f4fb3f8c
ds: 007b es: 007b ss: 0068
Process mpg123 (pid: 2131, threadinfo=f4fb2000 task=f7c58540)
Stack: <0>00000000 c1cf2be0 f74fb800 00000000 f7cac180 f4fb2000 c0169417 00000003
00000003 08056c28 ffffffff c0103169 00000003 00000000 b7ef7ff4 08056c28
ffffffff bfd6b2a0 00000006 0000007b c010007b 00000006 b7e86707 00000073
Call Trace:
[<c0169417>] filp_close+0x47/0x90
[<c0103169>] syscall_call+0x7/0xb
Code: 85 a9 00 00 00 8b 46 10 85 c0 74 42 8b 18 85 db 74 3c b8 01 00 00 00 e8 7a
39 fb ff e8 35 e3 0f 00 c1 e0 07 8d 84 18 00 01 00 00 <ff> 08 83 3b 02 0f 84 a5
00 00 00 b8 01 00 00 00 e8 96 39 fb ff
<6>note: mpg123[2131] exited with preempt_count 1
Oops on unplug. Fortunately it does not kill the system. It is not a recent
regression (I only started to play with this card few weeks ago). But I think I
can reproduce it with another usb sound card...
Ouch and don't worry about those softwatchdog messages, I added mdelay() to oops-printing code. .. and hardware is thinkpad x32 -- nothing too unusual. I could not reproduce the problem on 2.6.17-rc4, so I assume it is gone. |
Hardware Environment: i386 Steps to reproduce: Plug in usb sound card. root@amd:/home/pavel# cat /proc/asound/cards 0 [I82801DBICH4 ]: ICH4 - Intel 82801DB-ICH4 Intel 82801DB-ICH4 with AD1981B at 0xc0000c00, irq 5 1 [U0x4fa0x4201 ]: USB-Audio - USB Device 0x4fa:0x4201 USB Device 0x4fa:0x4201 at usb-0000:00:1d.1-1, full speed root@amd:/home/pavel# ...launch something to play on the soundcard. mpg123 -D /dev/dsp1 does that fine. (I don't hear anything from the speaker, but I guess that's separate problem). root@amd:/home/pavel# cat /proc/asound/card1/stream0 USB Device 0x4fa:0x4201 at usb-0000:00:1d.1-1, full speed : USB Audio Playback: Status: Running Interface = 1 Altset = 4 URBs = 8 [ 4 4 4 4 4 4 4 4 ] Packet Size = 49 Momentary freq = 48004 Hz (0x30.0100) Interface 1 Altset 1 Format: S16_LE Channels: 2 Endpoint: 1 OUT (ASYNC) Rates: 44100, 48000 Interface 1 Altset 2 Format: S16_LE Channels: 1 Endpoint: 1 OUT (ASYNC) Rates: 44100, 48000 Interface 1 Altset 3 Format: S8 Channels: 2 Endpoint: 1 OUT (ASYNC) Rates: 44100, 48000 Interface 1 Altset 4 Format: S8 Channels: 1 Endpoint: 1 OUT (ASYNC) Rates: 44100, 48000 Interface 1 Altset 5 Format: S16_LE Channels: 2 Endpoint: 1 OUT (ADAPTIVE) Rates: 44100, 48000 root@amd:/home/pavel# Now unplug USB without stopping sound...