Comment # 16 on bug 1187472 from Takashi Iwai

(In reply to Takashi Iwai from comment #15)
> Thanks, that's a good information.  Actually this is already fixed in the
> upstream subsytem, bluetooth-next.git repo
> commit da68ad722e54ce86fa6f87829cf60d12201cdfaa
>  Bluetooth: btqca: Don't modify firmware contents in-place
> 
> I'm rebuilding a test kernel with the backported patch in the same OBS repo,
> home:tiwai:bsc1187472.  It'll be kernel-default-5.12.12-*.g43254cf.
> Please give it a try later.  If this works, I'll push to stable branch.

FWIW, the compressed firmware files should work after this patch.