> Wolfram, what do you suggest ? Fixing the cp2112 driver is obviously necessary, but
> I do wonder if a check such as the one above would be appropriate as well, possibly
> even combined with a WARN_ONCE().

How annoying, there was still an unchecked case left? Sorry. Yes, the
core can have a check for a short-term solution. The long-term solution
is to support SMBUS3.x which allows for 255 byte transfers.