3ware rmmod - Unable to handle kernel NULL pointer dereference

Stephen Johnston sjohnsto at eso.org
Thu Jun 7 01:46:47 PDT 2001


We have a 3ware Escalade 6800 8 port ide card which the o/s sees as
scis, it works fine, except when you put a new disk onto the card.

With 8 disks if we

rmmod 3w-xxxx
remove 2 disks
swap them
modprobe 3w-xxx

no problems, the card see the disks have been swapped and its fine.

However if we use a new disk the card didnt know about to begin with

rmmod 3w-xxxx
remove a disk
replace with a new disk
modprobe 3w-xxx

there is a segmentation fault with the following error;

3w-xxxx: tw_poll_status(): Flag 0x40000 not found.
Unable to handle kernel NULL pointer dereference at virtual address
 printing eip:
pgd entry ddfb7000: 0000000000000000
pmd entry ddfb7000: 0000000000000000
... pmd not present!
Oops: 0000
CPU:    0
EIP:    0010:[<e08dc162>]
EFLAGS: 00010202
eax: 00000000   ebx: 0000b008   ecx: 00040000   edx: dfaec000
esi: dfaec000   edi: dfaec000   ebp: dfaec000   esp: dfaebe48
ds: 0018   es: 0018   ss: 0018
Process modprobe (pid: 916, stackpage=dfaeb000)
Stack: 00000080 00000286 0000b004 00000000 00000000 00000000 0000b00c
       0009f344 00000000 00000000 00000000 dfaec000 dfaec000 e08dc97a
       dfaec000 dfaebea4 00000000 dffed400 00000001 00000000 00000000
Call Trace: [<e08dc97a>] [<e08e19e0>] [<e08ddf52>] [<e08e19e0>]
[<e08e19e0>] [<e08dc000>] 
       [<e08df137>] [<e08e19e0>] [<e08e19e0>] [<c0116e05>] [<e08e1f80>]
[<e08d8000>] [<e08dc060>] [<c010901b>] 

Code: 0f b7 40 36 50 68 60 f4 8d e0 e8 2f 9e 83 df 5a b8 01 00 00

The kernel is 2.4.2-2

Any help would be appreciated, thank-you.



Stephen Johnston (NGAST/Beowulf Project)           Phone: +49 89
European Southern Observatory                      Fax  : +49 89
Karl-Schwarzschild-Strasse 2
D-85748 Garching bei Muenchen                      http://www.eso.org

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