Re: [BISECTED REGRESSION] b43legacy broken on G4 PowerBook

From: Benjamin Herrenschmidt
Date: Sat Jun 08 2019 - 00:26:35 EST

> Please try the attached patch. I'm not really pleased with it and I will
> continue to determine why the fallback to a 30-bit mask fails, but at least this
> one works for me.

Your patch only makes sense if the device is indeed capable of
addressing 31-bits.

So either the driver is buggy and asks for a too small mask in which
case your patch is ok, or it's not and you're just going to cause all
sort of interesting random problems including possible memory