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| author | Andrey Grodzovsky <andrey.grodzovsky@amd.com> | 2021-09-17 07:18:29 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-09-23 15:17:29 -0400 |
| commit | ebe86a57c882871a927986ee6514cb171483d074 (patch) | |
| tree | e92a0f0da99afa77d92f7e9341ca428f3488a059 /drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | |
| parent | c03509cbc01559549700e14c4a6239f2572ab4ba (diff) | |
| download | lwn-ebe86a57c882871a927986ee6514cb171483d074.tar.gz lwn-ebe86a57c882871a927986ee6514cb171483d074.zip | |
drm/amdgpu: Fix resume failures when device is gone
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index f18240f87387..15b27bcf5273 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -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; |