Fix underflow on Hawaii on 18.20 release branch

Thanks ___ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx

Fix underflow on Hawaii on 18.20 release branch

Rex Zhu's patch fixes an underflow issue observed on Hawaii. The patch is in drm-next-amd-staging branch, need an approval to port the patch into 18.20 release branch in order to resolve a ticket SWDEV-152336. Thanks ___ amd-gfx mailing list