[Bug 212655] AMDGPU crashes when resuming from suspend when amd_iommu=on

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=212655

coxackie (kostas.kardaras at gmail.com) changed:

           What    |Removed                     |Added
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                 CC|                            |kostas.kardaras at gmail.com

--- Comment #1 from coxackie (kostas.kardaras at gmail.com) ---
I have the same problem on Alienware Aurora R10 - AMD Radeon RX 5700 GPU. Arch
linux, Now at kernel 5.13. I have not "turned on iommu AMDGPU", but there is a
crash all the same. The monitor does not get any signal, so cannot turn on
after suspend.


logs:

```
amdgpu 0000:0d:00.0: amdgpu: message:          RunBtc (58)         param:
0x00000000 is timeout (no response)
amdgpu 0000:0d:00.0: amdgpu: RunBtc failed!
amdgpu 0000:0d:00.0: amdgpu: Failed to setup smc hw!
[drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR* resume of IP block <smu>
failed -62
amdgpu 0000:0d:00.0: amdgpu: amdgpu_device_ip_resume failed (-62).
PM: dpm_run_callback(): pci_pm_resume+0x0/0xe0 returns -62
amdgpu 0000:0d:00.0: PM: failed to resume async: error -62
amdgpu: Move buffer fallback to memcpy unavailable
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to process the buffer list -19!
```

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