[Bug 193341] New: AMDGPU: kernel NULL pointer dereferenced with hybrid graphics

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=193341

            Bug ID: 193341
           Summary: AMDGPU: kernel NULL pointer dereferenced with hybrid
                    graphics
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.9.6
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: stefan.kohek at um.si
        Regression: No

Created attachment 253261
  --> https://bugzilla.kernel.org/attachment.cgi?id=253261&action=edit
Kernel config, output of dmesh (with stack trace), output of lspci

The driver crashes when AMDGPU is used with a combination of R5 M230 and
MULLINS.

The driver work with MULLINS OK, when discrete GPU (01:00.0  R5 M230) is
disabled (in bios).

Kernel: Linux LenovoPC 4.9.6-1-ARCH #1 SMP PREEMPT Thu Jan 26 09:22:26 CET 2017
x86_64 GNU/Linux

Relevant config:
CONFIG_DRM_AMDGPU=m
CONFIG_DRM_AMDGPU_SI=y
CONFIG_DRM_AMDGPU_CIK=y
CONFIG_DRM_AMDGPU_USERPTR=y

I understand this is experimental case. Anyway, maybe somebody will fix it.  

This case work OK with RADEON driver (even offloading).

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