https://bugs.freedesktop.org/show_bug.cgi?id=73191
--- Comment #19 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #18)
I was replying to vladi, who reported it on a 7540D
That's also a different family (northern islands) which is handled by the the r600 driver rather than radeonsi.
r600 driver: r6xx, r7xx, evergreen, northern islands families
radeonsi driver: southern islands, sea islands families
That said, the commit in question hits both drivers.