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drm/amd: Clean up kfd node on surprise disconnect

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When an eGPU is unplugged the KFD topology should also be destroyed
for that GPU. This never happens because the fini_sw callbacks never
get to run. Run them manually before calling amdgpu_device_ip_fini_early()
when a device has already been disconnected.

This location is intentionally chosen to make sure that the kfd locking
refcount doesn't get incremented unintentionally.

Cc: kent.russell@amd.com
Closes: https://community.frame.work/t/amd-egpu-on-linux/8691/33
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 6a23e7b433)
Cc: stable@vger.kernel.org
This commit is contained in:
Mario Limonciello (AMD)
2026-01-07 15:37:28 -06:00
committed by Alex Deucher
parent 9cb6278b44
commit 28695ca09d
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -5063,6 +5063,14 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
amdgpu_ttm_set_buffer_funcs_status(adev, false);
/*
* device went through surprise hotplug; we need to destroy topology
* before ip_fini_early to prevent kfd locking refcount issues by calling
* amdgpu_amdkfd_suspend()
*/
if (drm_dev_is_unplugged(adev_to_drm(adev)))
amdgpu_amdkfd_device_fini_sw(adev);
amdgpu_device_ip_fini_early(adev);
amdgpu_irq_fini_hw(adev);