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drm/amdgpu: Fix resume failures when device is gone

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Problem:
When device goes into suspend and unplugged during it
then all HW programming during resume fails leading
to a bad SW during pci remove handling which follows.
Because device is first resumed and only later removed
we cannot rely on drm_dev_enter/exit here.

Fix:
Use a flag we use for PCIe error recovery to avoid
accessing registres. This allows to successfully complete
pm resume sequence and finish pci remove.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky 2021-09-17 07:18:29 -04:00 committed by Alex Deucher
parent c03509cbc0
commit ebe86a57c8
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
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@ -1508,6 +1508,10 @@ static int amdgpu_pmops_resume(struct device *dev)
struct amdgpu_device *adev = drm_to_adev(drm_dev);
int r;
/* Avoids registers access if device is physically gone */
if (!pci_device_is_present(adev->pdev))
adev->no_hw_access = true;
r = amdgpu_device_resume(drm_dev, true);
if (amdgpu_acpi_is_s0ix_active(adev))
adev->in_s0ix = false;