[Bug 111685] [Polaris 30] [Bisected] Kernel BUG during boot when amdgpu.dpm=0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111685

            Bug ID: 111685
           Summary: [Polaris 30] [Bisected] Kernel BUG during boot when
                    amdgpu.dpm=0
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: not set
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: omar.squircleart at gmail.com

Created attachment 145359
  --> https://bugs.freedesktop.org/attachment.cgi?id=145359&action=edit
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

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