[Bug 194559] New: amdgpu problems loading 2 firmwares on multi-smp system - bugzilla-daemon

From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 194559] New: amdgpu problems loading 2 firmwares on multi-smp system
Date: Sun, 12 Feb 2017 14:34:36 +0000	[thread overview]
Message-ID: <bug-194559-2300@https.bugzilla.kernel.org/> (raw)

https://bugzilla.kernel.org/show_bug.cgi?id=194559

            Bug ID: 194559
           Summary: amdgpu problems loading 2 firmwares on multi-smp
                    system
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.4.9
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: janpieter.sollie@dommel.be
        Regression: No

Created attachment 254705
  --> https://bugzilla.kernel.org/attachment.cgi?id=254705&action=edit
dmesg.txt, lspci.txt and .config

System: opteron 2876 (*2), 128GB ram, x86_64.
VGA1: SI, cape verde pro.
VGA2: R9 nano.
VGA3: onboard mgag200.
Distribution: gentoo.
kernel: vanilla-sources-4.9.9.
kernel loader: lilo 24
firmware: linux-firmware-20170126.
bug: amdgpu loading on the system causes a reboot. even when disabling panic,
the kernel does not wait for me to reset the system. the issue occurs even when
booting the system with init=/bin/bash and then modprobe amdgpu.
solutions:
1) removing /lib/firmware/radeon.
2) removing /lib/firmware/amdgpu.
3) boot the kernel with nosmp.
Each of these solutions works, but causes hardware not to be initialized
Tried without success:
1) using the radeon module instead of amdgpu.
2) using amdgpu-pro.
3) using a different kernel version (4.4.39).
4) boot with iommu=soft.
5) first load drm (works), then load amdgpu (crashes).

I suspect a nonsafe threaded kernel bug in drm.

In attachment:
1) dmesg of noSMP boot.
2) lspci output.
3) config of current 4.9.9 kernel.

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