Linux 7.0 Lands Fix For Years Old Bug Affecting AMD Hainan GPUs

Merged overnight for Linux 7.0 and set to be back-ported to existing Linux stable kernel versions is a fix for aging AMD GCN 1.0 "Hainan" GPU models. This closes a 2021 bug report that was long neglected and ended up being just a small tweak to fix the issue reported of GPU hangs...