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SubjectOops in firewire (2.4.21-pre5 with 2.4.21-pre4 firewire driver)
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I heard that the firewire merge in 2.4.21-pre5 was messed up, so I
replaced the -pre5 drivers/ieee1394 with the one from -pre4.

I got an oops while loading the driver. I will continue to experiment
with recent kernels, and try to find a bitkeeper snapshot with the
latest firewire fixes. Any suggestions are welcome.

(I am experimenting with recent kernels because these modules cause oops
and hangs with the latest Red Hat kernel as well. However, the hardware
works fine with older Red Hat kernels.)

Anyway, the oops is decoded below. System is an up to date Red Hat 8,
except for the kernel.

ohci1394_0: Unexpected PCI resource length of 1000!
ohci1394_0: OHCI-1394 1.0 (PCI): IRQ=[9] MMIO=[e9000000-e90007ff] Max Packet=[2048]
ieee1394: SelfID completion called outside of bus reset!
ieee1394: Device added: Node[00:1023] GUID[0004830000002cb3] [Oxford ]
ieee1394: Host added: Node[01:1023] GUID[0030dd8000505e29] [Linux OHCI-1394]
Unable to handle kernel NULL pointer dereference at virtual address 0000002c
printing eip:
c016e639
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c016e639>] Not tainted
EFLAGS: 00013246
eax: 00000000 ebx: d1e518c0 ecx: d1eaf550 edx: d1eaf550
esi: 00000000 edi: 00000000 ebp: 00000000 esp: d2547e60
ds: 0018 es: 0018 ss: 0018
Process kjournald (pid: 157, stackpage=d2547000)
Stack: c9656b00 d273f380 d1eaf550 d1e4dc60 c016c92d d1eaf550 c9656b00 00000004
000006e4 00000000 d273f3f4 00000000 000003dc c95ebc24 00000000 d1e4dc60
d1eaf3d0 000006e4 ce8ed480 c9656a40 ce8ed5a0 ce8ed540 ce8ed4e0 ce8ed480
Call Trace: [<c016c92d>] [<c01176fc>] [<c016f62a>] [<c016f4c0>] [<c010744e>]
[<c016f4e0>]

Code: 3b 5e 2c 74 29 89 34 24 89 5c 24 04 e8 56 01 00 00 8b 5c 24
<6>ieee1394: sbp2: Logged into SBP-2 device
ieee1394: sbp2: Node[00:1023]: Max speed [S400] - Max payload [2048]
scsi1 : IEEE-1394 SBP-2 protocol driver (host: ohci1394)
$Rev: 707 $ James Goodwin <jamesg@filanet.com>
SBP-2 module load options:
- Max speed supported: S400
- Max sectors per I/O supported: 255
- Max outstanding commands supported: 8
- Max outstanding commands per lun supported: 1
- Serialized I/O (debug): no
- Exclusive login: yes
Vendor: WDC WD12 Model: 00JB-00CRA1 Rev:
Type: Direct-Access ANSI SCSI revision: 06
Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
SCSI device sda: 234441648 512-byte hdwr sectors (120034 MB)
sda: sda1

>>EIP; c016e639 <__journal_remove_checkpoint+39/90> <=====

>>ebx; d1e518c0 <_end+11ae7e88/144df628>
>>ecx; d1eaf550 <_end+11b45b18/144df628>
>>edx; d1eaf550 <_end+11b45b18/144df628>
>>esp; d2547e60 <_end+121de428/144df628>

Trace; c016c92d <journal_commit_transaction+6dd/1180>
Trace; c01176fc <schedule+21c/360>
Trace; c016f62a <kjournald+14a/1d0>
Trace; c016f4c0 <commit_timeout+0/10>
Trace; c010744e <kernel_thread+2e/40>
Trace; c016f4e0 <kjournald+0/1d0>

Code; c016e639 <__journal_remove_checkpoint+39/90>
00000000 <_EIP>:
Code; c016e639 <__journal_remove_checkpoint+39/90> <=====
0: 3b 5e 2c cmp 0x2c(%esi),%ebx <=====
Code; c016e63c <__journal_remove_checkpoint+3c/90>
3: 74 29 je 2e <_EIP+0x2e>
Code; c016e63e <__journal_remove_checkpoint+3e/90>
5: 89 34 24 mov %esi,(%esp,1)
Code; c016e641 <__journal_remove_checkpoint+41/90>
8: 89 5c 24 04 mov %ebx,0x4(%esp,1)
Code; c016e645 <__journal_remove_checkpoint+45/90>
c: e8 56 01 00 00 call 167 <_EIP+0x167>
Code; c016e64a <__journal_remove_checkpoint+4a/90>
11: 8b 5c 24 00 mov 0x0(%esp,1),%ebx


Torrey Hoffman
thoffman@arnor.net

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