[Bug 205585] New: [Regression] [amdgpu] AMD Vega 64 GPU invalid access and EEH under load

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=205585

            Bug ID: 205585
           Summary: [Regression] [amdgpu] AMD Vega 64 GPU invalid access
                    and EEH under load
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.4-rc7
          Hardware: PPC-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: tpearson at raptorengineering.com
        Regression: No

Created attachment 285977
  --> https://bugzilla.kernel.org/attachment.cgi?id=285977&action=edit
backtrace

When using amdgpu with kernel 5.4-rc5 through 5.4-rc7, we are seeing invalid
DMA under load with the Vega 64.  This issue did not occur on 5.3 or earlier. 
The invalid DMA causes an EEH and knocks the GPU offline until a reboot.

Trace attached.

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