Hard crash when loading firewire-ohci

[Tobias G. <tob...@23...>]

[Resend because I wasn't subcribed before]

Hi,

in recent kernels (noticed with Debian kernel 6.5) I get a hard crash
when the firewire-ohci module is loaded.

I could bisect this issue to commit

dcadfd7f7c74ef9ee415e072a19bdf6c085159eb is the first bad commit
commit dcadfd7f7c74ef9ee415e072a19bdf6c085159eb
Author: Takashi Sakamoto <o-t...@sa...>
Date:   Tue May 30 08:12:40 2023 +0900

    firewire: core: use union for callback of transaction completion

But I'm not sure how to continue debugging from here, since I don't get
any output after

[Dec10 19:17] firewire_ohci 0000:0b:00.0: enabling device (0000 -> 0003)
[  +0.075791] firewire_ohci 0000:0b:00.0: added OHCI v1.0 device as card 0, 4 IR + 8 IT contexts, quirks 0x11

My hardware is:

0b:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev c0) (prog-if 10 [OHCI])
        Subsystem: VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller
        Flags: medium devsel, IRQ 255
        Memory at fc800000 (32-bit, non-prefetchable) [disabled] [size=2K]
        I/O ports at d000 [disabled] [size=128]
        Capabilities: [50] Power Management version 2
        Kernel modules: firewire_ohci

There are currently no devices connected.

I could work around the issue by blacklisting the module, since I
currently don't use the FireWire hardware (but there are still some DV
tapes waiting to be transferred...)

Regards, Tobias