The commit 28695ca09d32 ("drm/amd: Clean up kfd node on surprise
disconnect") introduced early KFD cleanup when drm_dev_is_unplugged()
returns true. However, this causes hangs during normal module unload
(rmmod amdgpu).
The issue occurs because drm_dev_unplug() is called in amdgpu_pci_remove()
for all removal scenarios, not just surprise disconnects. This was done
intentionally in commit 39934d3ed5725c ("Revert "drm/amdgpu: TA unload
messages are not actually sent to psp when amdgpu is uninstalled"") to
fix IGT PCI software unplug test failures. As a result,
drm_dev_is_unplugged() returns true even during normal module unload,
triggering the early KFD cleanup inappropriately.
The correct check should distinguish between:
- Actual surprise disconnect (eGPU unplugged): pci_dev_is_disconnected()
returns true
- Normal module unload (rmmod): pci_dev_is_disconnected() returns false
Replace drm_dev_is_unplugged() with pci_dev_is_disconnected() to ensure
the early cleanup only happens during true hardware disconnect events.
Reported-by: Cal Peake <[email protected]>
Closes:
https://lore.kernel.org/all/[email protected]/
Fixes: 28695ca09d32 ("drm/amd: Clean up kfd node on surprise disconnect")
Signed-off-by: Mario Limonciello <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index d2c3885de711f..8900e0dc8a61d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5068,7 +5068,7 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
* before ip_fini_early to prevent kfd locking refcount issues by
calling
* amdgpu_amdkfd_suspend()
*/
- if (drm_dev_is_unplugged(adev_to_drm(adev)))
+ if (pci_dev_is_disconnected(adev->pdev))
amdgpu_amdkfd_device_fini_sw(adev);
amdgpu_device_ip_fini_early(adev);
@@ -5080,7 +5080,7 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
amdgpu_gart_dummy_page_fini(adev);
- if (drm_dev_is_unplugged(adev_to_drm(adev)))
+ if (pci_dev_is_disconnected(adev->pdev))
amdgpu_device_unmap_mmio(adev);
}
--
2.52.0
