https://bugs.freedesktop.org/show_bug.cgi?id=106418
--- Comment #6 from Michel Dänzer michel@daenzer.net --- (In reply to davep from comment #5)
My name's Dave Panariti (david.and I'm going to be taking a look at this.
Thanks for looking into this, Dave. After hitting the BUG_ON again this week, I got fed up, took a closer look, and I think I found the problem here. This patch should fix it:
https://patchwork.freedesktop.org/patch/231303/