FAILED: Patch "drm/amd: Fix hang on amdgpu unload by using pci_dev_is_disconnected()" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From f7afda7fcd169a9168695247d07ad94cf7b9798f Mon Sep 17 00:00:00 2001
From: Mario Limonciello <[email protected]>
Date: Thu, 5 Feb 2026 10:42:54 -0600
Subject: [PATCH] drm/amd: Fix hang on amdgpu unload by using
pci_dev_is_disconnected()

The commit 6a23e7b4332c ("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 39934d3ed572 ("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.

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 528990a595ec9..9758221413814 100644
@@ -4924,7 +4924,7 @@ 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);

@@ -4936,7 +4936,7 @@ 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);
 
 }

2.51.0