[Polaris 30] [Bisected] Kernel BUG during boot when amdgpu.dpm=0

Submitted by Omar Emara

Assigned to Default DRI bug account

Link to original bug (#111685)

Description

Created attachment 145359
Bisect log

To reproduce, pass the parameter amdgpu.dpm=0 to a kernel v5.2 or higher. The kernel will hang at boot. v5.1 boots correctly.

I have bisected the kernel between v5.1 and v5.2, the bisect log is attached below.

The last three lines from the log are as follow, the full log is attached below:

kernel: BUG: unable to handle page fault for address: ffff91fe41bdf5f8
kernel: #PF: supervisor read access in kernel mode
kernel: #PF: error_code(0x0000) - not-present page

Attachment 145359, "Bisect log":
bisect.log