https://bugzilla.kernel.org/show_bug.cgi?id=214621
--- Comment #15 from Lang Yu (Lang.Yu@amd.com) --- (In reply to Erhard F. from comment #14)
(In reply to Lang Yu from comment #12)
The warning was just merged into mainline 5.15.0 on Tue Nov 2 16:47:49 2021(commit 56d33754481f). Not sure Erhard F.'s build contains this
warning. I applied your patch on top of v5.15 after its' release which was 2021-10-31 not on git master.
Many thanks for your help! I made a test patch to find who pinned amdgpu dmabuf. Could you please apply it on latest(commit 7ddb58cb0ecae8e8b6181d736a87667cc9ab8389) mainline 5.15.0, then reproduce the warning and collect full dmesg? As I still didn't reproduce it on my machine...