Kernel panic during AP6210 startup

[rosterloh]

Firstly thanks for all your work on this but I was wondering if you had any insight into this error I am having with your kernel sources on a MK802IV. I have rebuilt this kernel and repacked it with the ramdisk from the stock boot.img. It's crashing when initialising the bus for the AP6210 device.

[   17.880040] =========== WLAN placed in RESET ========
[   18.077627] dhd_bus_select_firmware_name_by_chip: firmware_path=/system/etc/firmware/fw_RK901a2.bin
[   18.077705] 
[   18.077710] Dongle Host Driver, version 1.28.23.6 (r)
[   18.077723] Compiled in drivers/net/wireless/bcmdhd on Sep 11 2013 at 14:36:36
[   18.077839] wl_android_wifi_on in 1
[   18.077869] wl_android_wifi_on in 2: g_wifi_on=0
[   18.077902] ANDROID-ERROR) wifi_set_power = 1
[   18.077939] rk29sdk_wifi_power: 1
[   18.330193] wifi turn on power
[   18.430381] =========== WLAN going back to live  ========
[   18.430412] sdio_reset_comm():
[   18.430451] rk29_sdmmc_change_clk_div..1935..  newDiv=42, newCLK=294Khz [sdio]
[   18.436366] rk29_sdmmc_change_clk_div..1935..  newDiv=0, newCLK=24750Khz [sdio]
[   18.436689] 
[   18.436693] 
[   18.436695] dhd_bus_devreset: == WLAN ON ==
[   18.436728] dhd_bus_devreset called when dongle is not in reset
[   18.436757] Will call dhd_bus_start instead
[   18.436812] bcmsdh_config_hw_oob_intr: Enable HW OOB for 43362
[   18.436989] dhd_bus_select_firmware_name_by_chip: firmware_path=/system/etc/firmware/fw_RK901a2.bin
[   18.437074] Final fw_path=/system/etc/firmware/fw_RK901a2.bin
[   18.437107] Final nv_path=/system/etc/firmware/nvram_AP6210.txt
[   18.437136] Final conf_path=/system/etc/firmware/config.txt
[   18.499856] dhdsdio_write_vars: Download, Upload and compare of NVRAM succeeded.
[   18.617139] Unable to handle kernel NULL pointer dereference at virtual address 00000394
[   18.632597] pgd = c0404000
[   18.635303] [00000394] *pgd=00000000
[   18.638888] Internal error: Oops: 5 [#1] PREEMPT SMP
[   18.643855] CPU: 0    Tainted: G         C   (3.0.36+ #279)
[   18.649437] PC is at __raw_spin_lock_irqsave+0x34/0xb8
[   18.654578] LR is at try_to_wake_up+0x28/0x358
[   18.659020] pc : [<c092e730>]    lr : [<c04680f4>]    psr: 60000193
[   18.659026] sp : c0acde28  ip : 02d0f000  fp : c0acde74
[   18.670506] r10: 00000000  r9 : 00000000  r8 : c0acc028
[   18.675729] r7 : c0acc000  r6 : 00000001  r5 : 00000394  r4 : c0acc028
[   18.682255] r3 : c0acc000  r2 : 00010003  r1 : 0000000f  r0 : 60000193
[   18.688773] Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
[   18.696171] Control: 10c5387d  Table: 8b51004a  DAC: 00000015
[   18.701915] 
[   18.701917] PC: 0xc092e6b0:
[   18.706193] e6b0  e5903004 e3530000 e5903000 05805004 e3530000 1a000003 eaffffe3 e5903000
[   18.714457] e6d0  e3530000 0affffe0 e5903004 e3530000 1afffff9 eaffffdc e58d0004 ebfff74e
[   18.722722] e6f0  e59d0004 eaffffed eaffffd0 e92d41f0 e1a0300d e3c34d7f e1a05000 e1a08004
[   18.730986] e710  e3c4703f e3a06001 e3c4303f e5932004 e2822001 e5832004 e10f0000 f10c0080
[   18.739254] e730  e1953f9f e3330000 01853f96 e3530000 0a000016 e121f000 e3c4403f e5943004
[   18.747520] e750  e2433001 e5843004 e5973000 e1a04008 e3130002 1a000010 e5953004 e3530000
[   18.755786] e770  e5953000 05856004 e3530000 1a000003 eaffffe4 e5953000 e3530000 0affffe1
[   18.764048] e790  e5953004 e3530000 1afffff9 eaffffdd f57ff05f e5853004 e8bd81f0 ebfff71e
[   18.772314] 

The stock system's boot messages after the panic look as follows:

[   55.633184] dhdsdio_write_vars: Download, Upload and compare of NVRAM succeeded.
[   55.858992] dhd_bus_init: enable 0x06, ready 0x06 (waited 0us)e
[   55.859308] bcmsdh_set_drvdata: Enter 
[   55.859381] bcmsdh_register_oob_intr: Enter 
[   55.859463] bcmsdh_register_oob_intr: IRQ=282 Type=4 
[   55.865498] Set country ALL, revision 0
[   55.938833] Country code: ALL (ALL/0)
[   55.949127]   Driver: 1.28.23.6 (r)
[   55.949135]   Firmware: wl0: Jul  5 2013 17:55:22 version 5.90.195.89.10 FWID 01-f4d31c13 
[   55.949222] wl_android_wifi_on: Success
[   55.951115] wl_cfg80211_attach_post: p2p0 p2p_dev_addr=02:22:f4:aa:65:d7
[   57.958224] wl_bss_connect_done succeeded with e0:3f:49:95:5e:f8
[   57.964221] wl_bss_connect_done succeeded with e0:3f:49:95:5e:f8
[   58.651719] acc_open
[   58.651814] acc_release
[   58.780885] init: no such service 'dhcpcd_'
[   65.064983] qtaguid: ctrl_counterset(s 1 10012): insufficient priv from pid=418 tgid=357 uid=1000
[   66.540371] init: sys_prop: permission denied uid:1001  name:media.cfg.audio.soundeffect
[   73.625437] init: sys_prop: permission denied uid:1003  name:service.bootanim.exit
[   86.911092] binder: 357:421 transaction failed 29189, size 100-4

I would really appreciate any help