[Bluez-users] bcm203x module causes kernel panic on boot

[Alex Holland <ah160@student.cs.york.ac.uk>]

I'm a Gentoo user, and recently upgraded from 2.4.22-r5 to Gentoo Dev Sources 
2.6.2. After suffering the following areas, I patched with the -mh2 patch, 
but they persisted.

I use a Belkin F8T001, and bluez-bluefw has always been a bit tempremental 
with me, so I jumped at the chance of using the bcm203x module in the kernel. 
Looking through the mailing list, I copied BCM2033-FW.bin and BCM2033-MD.hex 
to /usr/lib/hotplug/firmware/, unmerged bluefw gave things a try from a power 
off.

Below, I've pasted sections of the subsequent boot sequence. If the PC's 
turned on from power off (so the adaptor has no firmware already loaded, my 
PC will kernel panic, but continue booting and work okay, with the bluetooth 
subsystem working perfectly. Subsequent soft-reboots load Linux without any 
kernel panics, with bluetooth still working perfectly.

So, is this panic purely cosmetic, or is something fundamentally bad going on? 
In addition, could I suggest some documentation on the kernel help page for 
the bcm203x module to say where the firmware should be acquired/kept?

Alex Holland

----------------------------------------------------------------------------------------------

 * Mounting sysfs at /sys...                                              
[ ok ]modprobe: FATAL: Module keybdev not found.

Bluetooth: Broadcom Blutonium firmware driver ver 1.0
modprobe: FATAL: Module bcm203x already in kernel.

modprobe: FATAL: Module bcm203x already in kernel.

 * Mounting devpts at /dev/pts...                                         
[ ok ] * Starting devfsd...
Bluetooth: Core ver 2.3
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: HCI USB driver ver 2.4
modprobe: FATAL: Module hci_usb already in kernel.
Started device management daemon v1.3.25 for /dev
Unable to handle kernel NULL pointer dereference at virtual address 00000004
 printing eip:
c018253a
*pde = 00000000
Oops: 0000 [#1]
CPU:    0
EIP:    0060:[<c018253a>]    Not tainted
EFLAGS: 00010246
EIP is at sysfs_release+0x2a/0x90
eax: cf4f9a00   ebx: 00000000   ecx: cf9c8e40   edx: cf4f9ac8
esi: c136cac0   edi: cffe4f00   ebp: cf4da0c0   esp: cf5e9f68
ds: 007b   es: 007b   ss: 0068
Process default.hotplug (pid: 302, threadinfo=cf5e8000 task=c130c6e0)
Stack: cf4f9ac8 cf9c8e40 00000000 c014fb40 cf4da0c0 cf9c8e40 cf939180 cf9c8e40
       00000000 cf7e4c80 cf5e8000 c014e199 cf9c8e40 cf7e4c80 cf7e4c80 cf9c8e40
       00000001 c014e231 cf9c8e40 cf7e4c80 00000001 080d7f40 c0108f47 00000001
Call Trace:
 [<c014fb40>] __fput+0x100/0x120
 [<c014e199>] filp_close+0x59/0x90
 [<c014e231>] sys_close+0x61/0xa0
 [<c0108f47>] syscall_call+0x7/0xb

Code: 8b 43 04 85 c0 74 1f bb 00 e0 ff ff 21 e3 ff 43 14 ff 88 c0

---------------------------------------------------------------------------------


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