Crash problem of HostAP driver-2002-10-12 on MPC857 platform

[Hu Tao-a2587c]

Kernel Version: 2.4.2
PCMCIA Version: 3.1.31
HostAP Version: 2002-10-12
WLAN NIC:	Prism II, manId: 0x0156, 0x0002
HW Platform: IAD857 (Motorola PowerPC857)

All of the modules(pcmcia_core, m8xx_pcmcia, ds, hostap_crypt, hostap, hostap_cs)had been loaded successfully,
and the cardmgr had been started.

When "ifconfig wlan0 up" is used to bring up the NIC, crash occured. Following is the oops:

Oops: kernel access of bad area, sig: 11
NIP: C010B83C XER: E000017F LR: C001BBAC SP: C1EF3D70 REGS: c1ef3cc0 TRAP: 0300
MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: 64756C69, DSISR: 0000013F
TASK = c1ef2000[79] 'ifconfig' Last syscall: 54 
last math 00000000 last altivec 00000000
GPR00: 00000000 C1EF3D70 C1EF2000 C0159DE8 00000001 C1F73000 C02523F8 00000000 
GPR08: 00000000 C0141BB0 C010B83C C0141BB0 91003139 1005A5C0 01FAC000 FF780000 
GPR16: 00000000 00000000 02000000 00000000 00009032 FFFF8914 C1EF3DD8 00008914 
GPR24: 00000000 00000000 C1F73000 00000002 00000000 00000001 C1F73000 64756C65 
Call backtrace: 
00000001 C001BBAC C00C0510 C00C1BDC C00EFDBC C00F216C C00BA674 
C00454CC C000245C 100028B4 1001AC4C 1002E128 1002DD78 0FF0A3A4 
00000000

When "kill" cardmgr, a another carsh occured:

unbind_request(0, 'hostap_cs')
prism2_detach
hostap_cs: detach postponed, 'wlan0' still locked
prism2_release
cs: CardServices(ReleaseConfiguration, 0xc0253860, 0x00000000)
m8xx_pcmcia: Service(0, 4, 0xc02f780c)
m8xx_set_socket: Enter
m8xx_pcmcia: SetSocket(0, flags 0x200, Vcc 50, Vpp 0, io_irq 0, csc_mask 0x80)
voltage_set: Enter
voltage_set: Exit
m8xx_set_socket: Exit
m8xx_pcmcia: Service(0, 6, 0xc1f0faf8)
m8xx_pcmcia: SetIOMap(0, 0, 0x00, 0 ns, 0x0000-0x0001)
m8xx_get_graycode: Enter
m8xx_get_graycode: Exit
cs: CardServices(ReleaseIO, 0xc0253860, 0xc0253b90)
cs: CardServices(ReleaseIRQ, 0xc0253860, 0xc0253ba4)
release - done
cs: CardServices(DeregisterClient, 0xc0253860, 0x00000001)
cs: deregister_client(c0253860)
Oops: kernel access of bad area, sig: 11
NIP: C010B860 XER: E000017F LR: C001BBAC SP: C1F0FA90 REGS: c1f0f9e0 TRAP: 0300
MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: 64756C69, DSISR: 00000069
TASK = c1f0e000[29] 'cardmgr' Last syscall: 54 
last math 00000000 last altivec 00000000
GPR00: 00000014 C1F0FA90 C1F0E000 C0159DE8 C1F73000 C1F73000 C02523F8 00000000 
GPR08: 00000000 64756C65 C010B858 C0141BB0 91BB5135 10021E54 01FAC000 FF780000 
GPR16: 00004000 00000014 0200000C 20040000 00009032 01F0FE80 00000000 C02C6260 
GPR24: C0150000 C014F170 00000000 C1F0FB18 C02C61A4 00000006 C1F73000 64756C65 
Call backtrace: 
00000006 C001BBAC C00C2948 C0099C34 C3436E90 C34374A4 C3418B98 
C3419898 C00454CC C000245C 00000000 10003664 10003E64 100045E8 
0FF0A3A4 00000000 


Is there any one can help me?
Thanks in advance!