Kernel crashes during bootup

[Achin Gupta]

Hi,
I am trying to add support for an Intel NOR flash device on my ARM
1026EJ-S board. I am using Linux version 2.6.11.12. As mentioned in the
"mtd-jffs-HOWTO.txt", I was able to patch my kernel with the latest MTD
code (I checked it out today). However during kernel bootup, I get the
following crash :-

>>>>>>>>>.
physmap flash device: 1000000 at 38000000
phys_mapped_flash: Found 1 x16 devices at 0x0 in 8-bit bank
 Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
cfi_cmdset_0001: Erase suspend on write enabled
cmdlinepart partition parsing not available
RedBoot partition parsing not available
mtd: Giving out device 0 to phys_mapped_flash
Unable to handle kernel NULL pointer dereference at virtual address
00000000
pgd = c0014000
[00000000] *pgd=00000000
Internal error: Oops: 5 [#1]
Modules linked in:
CPU: 0
PC is at vsnprintf+0x7c/0x578
LR is at class_simple_device_add+0x7c/0xd0
pc : [<c00cb554>]    lr : [<c00e5b28>]    Not tainted
sp : c09cff08  ip : c09cff4c  fp : c09cff48
r10: c09af9a7  r9 : c09af994  r8 : 00000000
r7 : fffffff4  r6 : c09cff78  r5 : c09af94c  r4 : c09af940
r3 : c09af993  r2 : 00000000  r1 : 00000014  r0 : c09af994
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  Segment kernel
Control: 5397F  Table: 00014000  DAC: 00000017
Process swapper (pid: 1, stack limit = 0xc09ce194)
Stack: (0xc09cff08 to 0xc09d0000)
ff00:                   c09cff14 c00c7fa8 c00c7e28 00000000 00000014
00000000
ff20: c09af940 c09af94c c09da380 fffffff4 00000000 00000000 05a00000
c09cff70
ff40: c09cff4c c00e5b28 c00cb4e4 c0bf0800 c01b423c c017ffc4 c017ffd4
00000000
ff60: 00000000 c09cff94 c09cff78 c00f7670 c00e5abc 00000000 c0164f5c
00000000
ff80: c017fff4 c0bf0800 c09cffb4 c09cff98 c00f5c1c c00f763c 00000000
c01b4284
ffa0: 00000000 c01b4290 c09cffd4 c09cffb8 c0025c98 c00f5ba0 c00292e8
c09ce000
ffc0: 00000000 c0029308 c09cfff4 c09cffd8 c002b0e0 c0025b6c 00000000
00000000
ffe0: 00000000 00000000 00000000 c09cfff8 c0040db0 c002b060 00000000
00000000
Backtrace:
[<c00cb4d8>] (vsnprintf+0x0/0x578) from [<c00e5b28>]
(class_simple_device_add+0x7c/0xd0)
[<c00e5ab0>] (class_simple_device_add+0x4/0xd0) from [<c00f7670>]
(mtd_notify_add+0x40/0x7c
)
[<c00f7630>] (mtd_notify_add+0x0/0x7c) from [<c00f5c1c>]
(add_mtd_device+0x88/0x104)
 r5 = C0BF0800  r4 = C017FFF4
[<c00f5b94>] (add_mtd_device+0x0/0x104) from [<c0025c98>]
(init_physmap+0x138/0x180)
 r7 = C01B4290  r6 = 00000000  r5 = C01B4284  r4 = 00000000
[<c0025b60>] (init_physmap+0x0/0x180) from [<c002b0e0>]
(init+0x8c/0x1c8)
 r7 = C0029308  r6 = 00000000  r5 = C09CE000  r4 = C00292E8
[<c002b054>] (init+0x0/0x1c8) from [<c0040db0>] (do_exit+0x0/0x9ec)
 r7 = 00000000  r6 = 00000000  r5 = 00000000  r4 = 00000000
Code: e2403001 e15a0003 32603000 350b3030 (e5d23000)
 <0>Kernel panic - not syncing: Attempted to kill init!
>>>>>>>>>>>>>>>.

I am getting this problem consistently. Can someone please tell me where
I could be going worng!

Warm regards,
Achin




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