Snowball: Crash observed while bootup

Description:
-------------
Device crashes during bootup of Ubuntu image.
This issue is not reproducible always, observed around 2-3 times during 5-6 hours of board usage.

Steps to reproduce:
----------------------
Precondition: Snowball device is up and running Ubuntu image.
1. Remove power supply and connect again and power up board.
Issue: Crash observed immediately after UI came up.

Not reproducible - seen only 2/3 times

Hardware:
---------
Snowball V11

Software:
------------
http://snapshots.linaro.org/precise/hwpacks/lt-snowball-x11-base/15/hwpack_linaro-lt-snowball-x11-base_20120424-15_armhf_supported.tar.gz
http://snapshots.linaro.org/precise/images/ubuntu-desktop/119/linaro-precise-ubuntu-desktop-20120426-119.tar.gz

emmc image.

Crash logs:
-----------

Welcome to Linaro 12.04 (GNU/Linux 3.3.1-37-linaro-lt-ux500 armv7l)

 * Documentation: https://wiki.linaro.org/

root@linaro-ubuntu-desktop:~# [ 16.513946] cg2900-btacl cg2900-btacl.0: CG2900 self test failed
[ 16.855957] init: Failed to create pty - disabling logging for job
[ 17.065368]
[ 17.065399] [4f9e5e85:1852c627] CG2900_FM_Driver: Sending Gen Power Up
[ 17.149627]
[ 17.149627] [4f9e5e85:1d57ffcb] CG2900_FM_Driver: Sending Set Mode
[ 18.797027] init: Failed to create pty - disabling logging for job
[ 32.203796] Unable to handle kernel paging request at virtual address 6ed22fc8
[ 32.211029] pgd = c0004000
[ 32.233184] [6ed22fc8] *pgd=00000000
[ 32.236755] Internal error: Oops: 5 [#1] PREEMPT SMP
[ 32.241729] dbx500_dump notified of crash
[ 32.247802] Modules linked in: cw1200_wlan(C) cw1200_core(C) mac80211 g_multi
[ 32.254974] CPU: 1 Tainted: G WC (3.3.1-37-linaro-lt-ux500 #37~lt~ci~20120422001938+1335057841~4f938b89-Ubuntu)
[ 32.266235] PC is at dapm_seq_run.isra.7+0x6c/0x3b0
[ 32.271118] LR is at ux500_ab8500_power_control_dec+0x50/0xe8
[ 32.276885] pc : [<c0516658>] lr : [<c052437c>] psr: 200f0113
[ 32.276885] sp : eb8afe28 ip : 00000001 fp : eb8afe6c
[ 32.288391] r10: ebf2af40 r9 : eb8afe38 r8 : eb8afdd0
[ 32.293640] r7 : ebb584b0 r6 : c0a636e8 r5 : 0000000b r4 : 0000000c
[ 32.300140] r3 : eb8afe38 r2 : eb8afe38 r1 : eb8afe38 r0 : eb8afe80
[ 32.306701] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 32.314025] Control: 10c5787d Table: 29bb004a DAC: 00000015
[ 32.319793] Process kworker/1:0 (pid: 8, stack limit = 0xeb8ae2f0)
[ 32.325958] Stack: (0xeb8afe28 to 0xeb8b0000)
[ 32.330322] fe20: 00000002 eb8afe80 eb8afe38 00000000 ebf2afa8 ebf2afa8
[ 32.338500] fe40: ebf22ab0 c0a699d0 c0a699d8 ebf22ab0 eb8afe88 c0a69a30 c0a69a48 c0a69960
[ 32.346710] fe60: eb8afebc eb8afe70 c0516d68 c05165f8 eb8afea4 00000002 eb8afe78 eb8afe78
[ 32.354919] fe80: ebf2afa8 ebf2afa8 eb8afe88 eb8afe88 ebff23c0 ebf22ab0 c0a69960 c08bced0
[ 32.363128] fea0: c0a69a1c 00000002 c09f7b00 c0a1bcc0 eb8afee4 eb8afec0 c0517040 c0516a98
[ 32.371307] fec0: 00000002 ebf22a14 00000002 c08bced0 ebf22a00 ebf1e478 eb8aff04 eb8afee8
[ 32.379486] fee0: c05185f8 c0516fa4 ebf1e478 ebf1e40c ebf172c0 c174cf00 eb8aff2c eb8aff08
[ 32.387634] ff00: c0519afc c05185c4 c06ad9dc c004928c eb813440 eb8ae000 c17478c0 c174cf00
[ 32.395812] ff20: eb8aff6c eb8aff30 c0049218 c0519aa4 c17478c8 c174cf05 c0519a98 00000000
[ 32.403991] ff40: eb8aff5c eb813440 c17478c0 c17478c8 eb813450 eb8ae000 c09f7b00 c0a1bcc0
[ 32.412170] ff60: eb8affb4 eb8aff70 c00498f4 c00490ec eb8aff8c eb8aff80 c06ad388 c09f7b00
[ 32.420349] ff80: c09f7b00 c09f7b00 00000013 eb83de58 eb813440 c00497a8 00000013 00000000
[ 32.428527] ffa0: 00000000 00000000 eb8afff4 eb8affb8 c004ecb4 c00497b4 00000000 00000000
[ 32.436706] ffc0: eb813440 00000000 00000000 00000000 eb8affd0 eb8affd0 00000000 eb83de58
[ 32.444854] ffe0: c004ec1c c00102f4 00000000 eb8afff8 c00102f4 c004ec28 dffffdfb ffbd7fff
[ 32.453063] [<c0516658>] (dapm_seq_run.isra.7+0x6c/0x3b0) from [<c0516d68>] (dapm_power_widgets+0x2dc/0x50c)
[ 32.462890] [<c0516d68>] (dapm_power_widgets+0x2dc/0x50c) from [<c0517040>] (soc_dapm_stream_event+0xa8/0xf0)
[ 32.472808] [<c0517040>] (soc_dapm_stream_event+0xa8/0xf0) from [<c05185f8>] (snd_soc_dapm_stream_event+0x40/0x50)
[ 32.483154] [<c05185f8>] (snd_soc_dapm_stream_event+0x40/0x50) from [<c0519afc>] (close_delayed_work+0x64/0xd4)
[ 32.493255] [<c0519afc>] (close_delayed_work+0x64/0xd4) from [<c0049218>] (process_one_work+0x138/0x4ac)
[ 32.502746] [<c0049218>] (process_one_work+0x138/0x4ac) from [<c00498f4>] (worker_thread+0x14c/0x314)
[ 32.511962] [<c00498f4>] (worker_thread+0x14c/0x314) from [<c004ecb4>] (kthread+0x98/0xa4)
[ 32.520233] [<c004ecb4>] (kthread+0x98/0xa4) from [<c00102f4>] (kernel_thread_exit+0x0/0x8)
[ 32.528594] Code: e1a04003 e1a05003 e50b3038 e5983000 (e7962103)
[ 32.534790] Unhandled fault: imprecise external abort (0x1406) at 0x0084f214
[ 32.610076] ---[ end trace 8d9bb0bbf07fe49b ]---
[ 32.621490] Unable to handle kernel paging request at virtual address fffffffc
[ 32.628723] pgd = c0004000
[ 32.631439] [fffffffc] *pgd=2c3fe821, *pte=00000000, *ppte=00000000
[ 32.637725] Internal error: Oops: 17 [#2] PREEMPT SMP
[ 32.642761] dbx500_dump notified of crash
[ 32.648834] Modules linked in: cw1200_wlan(C) cw1200_core(C) mac80211 g_multi
[ 32.655975] CPU: 1 Tainted: G D WC (3.3.1-37-linaro-lt-ux500 #37~lt~ci~20120422001938+1335057841~4f938b89-Ubuntu)
[ 32.667205] PC is at kthread_data+0x18/0x20
[ 32.671386] LR is at wq_worker_sleeping+0x1c/0xe0
[ 32.676086] pc : [<c004efd4>] lr : [<c004a4ac>] psr: 000f0093
[ 32.676116] sp : eb8afb48 ip : eb8afb58 fp : eb8afb54
[ 32.687561] r10: 00000028 r9 : 6ed22fc8 r8 : 00000001
[ 32.692779] r7 : eb8ae000 r6 : eb88f800 r5 : c1749b40 r4 : 00000001
[ 32.699310] r3 : 00000000 r2 : 00000000 r1 : 00000001 r0 : eb88f580
[ 32.705841] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user
[ 32.713043] Control: 10c5787d Table: 2abd404a DAC: 00000015
[ 32.718811] Process kworker/1:0 (pid: 8, stack limit = 0xeb8ae2f0)
[ 32.724975] Stack: (0xeb8afb48 to 0xeb8b0000)
[ 32.729339] fb40: eb8afb6c eb8afb58 c004a4ac c004efc8 0420806c eb88f580
[ 32.737487] fb60: eb8afc0c eb8afb70 c06ac4f0 c004a49c eb892fc4 eb892ac0 00000000 00000000
[ 32.745666] fb80: eb8afba4 c06ac7e4 c09f7b40 c09f7b40 c09f539c c09f7b40 eb8afbe4 eb8afba8
[ 32.753845] fba0: c0030020 c0354e90 eb82b340 c00a0318 00000001 00000020 eb88f580 eb88f580
[ 32.762023] fbc0: 00000020 00000001 eb8afbe4 eb8afbd8 c00a0318 c00a019c eb8afc04 eb8afbe8
[ 32.770202] fbe0: c003060c eb88f580 eb8ae000 0000000b 00000001 00000005 6ed22fc8 00000028
[ 32.778381] fc00: eb8afc1c eb8afc10 c06ac7e4 c06ac054 eb8afc44 eb8afc20 c0031600 c06ac798
[ 32.786560] fc20: eb8afde0 eb8ae000 00000000 00000005 00000005 00000028 eb8afc64 eb8afc48
[ 32.794708] fc40: c0013868 c00313bc 00000000 6ed22fc8 00000005 eb8afde0 eb8afc7c eb8afc68
[ 32.802886] fc60: c0696860 c0013790 eb8afde0 eb88f580 eb8afd14 eb8afc80 c001b7ac c0696808
[ 32.811065] fc80: 00000000 eb8afc90 c0351ae8 eb8ba840 c0a284c8 c0a284c8 eb8afccc eb8afca8
[ 32.819244] fca0: c03cd1ec c03cdeb4 00000000 c06ab35c eb8afe38 c00554c8 ebc77800 c082eb90
[ 32.827423] fcc0: ebc77800 00000000 c082eb90 c082eb90 eb8afcf4 eb8afce0 c00554c8 c005543c
[ 32.835601] fce0: 00000000 c0350124 eb8afd24 00000005 c0a21a8c 6ed22fc8 eb8afde0 eb8afdd0
[ 32.843780] fd00: eb8afe38 ebf2af40 eb8afd34 eb8afd18 c001b92c c001b50c 00000005 c0a21a8c
[ 32.851928] fd20: 6ed22fc8 eb8afde0 eb8afddc eb8afd38 c00083c0 c001b890 eb8afd74 eb8afd48
[ 32.860107] fd40: c0523ec4 c03502c0 c0a25dd8 c0a82608 eb8afd74 eb8afd60 c0f304e8 c0a82608
[ 32.868286] fd60: c08b8818 c052437c eb8afd94 eb8afd78 c052437c c06ab35c ebb58400 c05144cc
[ 32.876464] fd80: ebf48340 00000008 eb8afda4 eb8afd98 c0524434 c0524338 eb8afde4 eb8afda8
[ 32.884643] fda0: c05144f0 c0524420 c08b8818 c0a69960 eb8afe38 00000000 eb8afde4 ebf48340
[ 32.892822] fdc0: c0516658 200f0113 ffffffff eb8afe14 eb8afe6c eb8afde0 c000f218 c0008388
[ 32.900970] fde0: eb8afe80 eb8afe38 eb8afe38 eb8afe38 0000000c 0000000b c0a636e8 ebb584b0
[ 32.909149] fe00: eb8afdd0 eb8afe38 ebf2af40 eb8afe6c 00000001 eb8afe28 c052437c c0516658
[ 32.917327] fe20: 200f0113 ffffffff 00000002 eb8afe80 eb8afe38 00000000 ebf2afa8 ebf2afa8
[ 32.925506] fe40: ebf22ab0 c0a699d0 c0a699d8 ebf22ab0 eb8afe88 c0a69a30 c0a69a48 c0a69960
[ 32.933685] fe60: eb8afebc eb8afe70 c0516d68 c05165f8 eb8afea4 00000002 eb8afe78 eb8afe78
[ 32.941864] fe80: ebf2afa8 ebf2afa8 eb8afe88 eb8afe88 ebff23c0 ebf22ab0 c0a69960 c08bced0
[ 32.950012] fea0: c0a69a1c 00000002 c09f7b00 c0a1bcc0 eb8afee4 eb8afec0 c0517040 c0516a98
[ 32.958190] fec0: 00000002 ebf22a14 00000002 c08bced0 ebf22a00 ebf1e478 eb8aff04 eb8afee8
[ 32.966369] fee0: c05185f8 c0516fa4 ebf1e478 ebf1e40c ebf172c0 c174cf00 eb8aff2c eb8aff08
[ 32.974548] ff00: c0519afc c05185c4 c06ad9dc c004928c eb813440 eb8ae000 c17478c0 c174cf00
[ 32.982727] ff20: eb8aff6c eb8aff30 c0049218 c0519aa4 c17478c8 c174cf05 c0519a98 00000000
[ 32.990905] ff40: eb8aff5c eb813440 c17478c0 c17478c8 eb813450 eb8ae000 c09f7b00 c0a1bcc0
[ 32.999084] ff60: eb8affb4 eb8aff70 c00498f4 c00490ec eb8aff8c eb8aff80 c06ad388 c09f7b00
[ 33.007232] ff80: c09f7b00 c09f7b00 00000013 eb83de58 eb813440 c00497a8 00000013 00000000
[ 33.015411] ffa0: 00000000 00000000 eb8afff4 eb8affb8 c004ecb4 c00497b4 00000000 00000000
[ 33.023590] ffc0: eb813440 00000001 00000000 00000000 eb8affd0 eb8affd0 00000000 eb83de58
[ 33.031768] ffe0: c004ec1c c00102f4 00000000 eb8afff8 c00102f4 c004ec28 dffffdfb ffbd7fff
[ 33.039947] [<c004efd4>] (kthread_data+0x18/0x20) from [<c004a4ac>] (wq_worker_sleeping+0x1c/0xe0)
[ 33.048950] [<c004a4ac>] (wq_worker_sleeping+0x1c/0xe0) from [<c06ac4f0>] (__schedule+0x4a8/0x634)
[ 33.057891] [<c06ac4f0>] (__schedule+0x4a8/0x634) from [<c06ac7e4>] (schedule+0x58/0x70)
[ 33.066009] [<c06ac7e4>] (schedule+0x58/0x70) from [<c0031600>] (do_exit+0x250/0x3d8)
[ 33.073822] [<c0031600>] (do_exit+0x250/0x3d8) from [<c0013868>] (die+0xe4/0x134)
[ 33.081329] [<c0013868>] (die+0xe4/0x134) from [<c0696860>] (__do_kernel_fault.part.8+0x64/0x84)
[ 33.090118] [<c0696860>] (__do_kernel_fault.part.8+0x64/0x84) from [<c001b7ac>] (do_page_fault+0x2ac/0x2f0)
[ 33.099853] [<c001b7ac>] (do_page_fault+0x2ac/0x2f0) from [<c001b92c>] (do_translation_fault+0xa8/0xb0)
[ 33.109252] [<c001b92c>] (do_translation_fault+0xa8/0xb0) from [<c00083c0>] (do_DataAbort+0x44/0xa8)
[ 33.118377] [<c00083c0>] (do_DataAbort+0x44/0xa8) from [<c000f218>] (__dabt_svc+0x38/0x60)
[ 33.126647] Exception stack(0xeb8afde0 to 0xeb8afe28)
[ 33.131683] fde0: eb8afe80 eb8afe38 eb8afe38 eb8afe38 0000000c 0000000b c0a636e8 ebb584b0
[ 33.139862] fe00: eb8afdd0 eb8afe38 ebf2af40 eb8afe6c 00000001 eb8afe28 c052437c c0516658
[ 33.148040] fe20: 200f0113 ffffffff
[ 33.151550] [<c000f218>] (__dabt_svc+0x38/0x60) from [<c0516658>] (dapm_seq_run.isra.7+0x6c/0x3b0)
[ 33.160491] [<c0516658>] (dapm_seq_run.isra.7+0x6c/0x3b0) from [<c0516d68>] (dapm_power_widgets+0x2dc/0x50c)
[ 33.170318] [<c0516d68>] (dapm_power_widgets+0x2dc/0x50c) from [<c0517040>] (soc_dapm_stream_event+0xa8/0xf0)
[ 33.180236] [<c0517040>] (soc_dapm_stream_event+0xa8/0xf0) from [<c05185f8>] (snd_soc_dapm_stream_event+0x40/0x50)
[ 33.190612] [<c05185f8>] (snd_soc_dapm_stream_event+0x40/0x50) from [<c0519afc>] (close_delayed_work+0x64/0xd4)
[ 33.200683] [<c0519afc>] (close_delayed_work+0x64/0xd4) from [<c0049218>] (process_one_work+0x138/0x4ac)
[ 33.210174] [<c0049218>] (process_one_work+0x138/0x4ac) from [<c00498f4>] (worker_thread+0x14c/0x314)
[ 33.219390] [<c00498f4>] (worker_thread+0x14c/0x314) from [<c004ecb4>] (kthread+0x98/0xa4)
[ 33.227661] [<c004ecb4>] (kthread+0x98/0xa4) from [<c00102f4>] (kernel_thread_exit+0x0/0x8)
[ 33.235992] Code: e24cb004 e92d4000 e8bd4000 e5903254 (e5130004)