Reloading problem

[Jeong-Hwan Seo]

Hi everybody.
I already read post about reloading problem of
libertas driver module.
(Reloading of libertas driver module make kernel
broken.)
Has anybody found solution about the problem?

This is log messages about the problem
=======================================================================================
# insmod libertas_sdio.ko
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
firmware: requesting helper_sd.bin
firmware: requesting sd8686.bin
libertas: 00:50:43:02:fe:01, fw 9.70.2p1, cap
0x0000030b
libertas: eth0: Marvell WLAN 802.11 adapter
# rmmod libertas_sdio
# insmod libertas_sdio.ko
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
firmware: requesting helper_sd.bin
firmware: requesting sd8686.bin
Unable to handle kernel NULL pointer dereference at
virtual address 00000b18
pgd = c0004000
[00000b18] *pgd=00000000
Internal error: Oops: 17 [#1] PREEMPT
Modules linked in: libertas_sdio(+) [last unloaded:
libertas_sdio]
CPU: 0    Not tainted  (2.6.26-00186-g76fe58a-dirty
#50)
PC is at lbs_host_to_card_done+0x70/0x134
LR is at lbs_host_to_card_done+0x70/0x134
pc : [<c017c6b0>]    lr : [<c017c6b0>]    psr:
80000193
sp : c7111f38  ip : c7111f38  fp : c7111f4c
r10: 00000000  r9 : 00000002  r8 : 00400001
r7 : c03b1878  r6 : c7111f5c  r5 : 00000000  r4 :
80000113
r3 : 00000000  r2 : c7110000  r1 : 00000001  r0 :
00000001
Flags: Nzcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM 
Segment kernel
Control: 00c5387f  Table: 57100008  DAC: 00000017
Process ksdiorqd (pid: 802, stack limit = 0xc7110260)
Stack: (0xc7111f38 to 0xc7112000)
1f20:                                                 
     00000002 c70e0000
1f40: c7111f8c c7111f50 bf00125c c017c64c 00000000
00000195 00000000 00000000
1f60: 00000000 00000000 c7989000 c7a41e00 c7a41e00
00000001 00000002 00000000
1f80: c7111fd4 c7111f90 c01d56bc bf001168 00000000
c7111fa7 00000002 c7110000
1fa0: 00000001 020392ac c7111fd4 c7110000 c7989000
c01d55c4 00000000 00000000
1fc0: 00000000 00000000 c7111ff4 c7111fd8 c0054df8
c01d55d0 00000000 00000000
1fe0: 00000000 00000000 00000000 c7111ff8 c0042ca0
c0054da8 c0000bd8 c0000b70
Backtrace:
[<c017c640>] (lbs_host_to_card_done+0x0/0x134) from
[<bf00125c>] (if_sdio_interrupt+0x100/0x958
[libertas_sdio])
 r5:c70e0000 r4:00000002
[<bf00115c>] (if_sdio_interrupt+0x0/0x958
[libertas_sdio]) from [<c01d56bc>]
(sdio_irq_thread+0xf8/0x1f8)
[<c01d55c4>] (sdio_irq_thread+0x0/0x1f8) from
[<c0054df8>] (kthread+0x5c/0x94)


What I find out is card->priv is NULL pointer.
In, if_sdio.c if_sdio_interrupt calls
lbs_host_tocard_done(card->priv)
Here, card->priv is NULL pointer.
And, when kernel try to access priv it crashes.
I hope somebody could solve this problem.

I appreciate your help.




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