[PATCH] drm/amdgpu: revert part of a commit fac53471d0ea9

[vitaly.prosyak at amd.com]

From: Vitaly Prosyak <vitaly.prosyak at amd.com>

Revert the following change: move drm_dev_unplug call after
amdgpu_driver_unload_kms in amdgpu_pci_remove.
The reason is following: amdgpu_pci_remove calls drm_dev_unregister
and it should be called first to ensure userspace can't access the
device instance anymore. If we call drm_dev_unplug after
amdgpu_driver_unload_kms then we observe IGT PCI software unplug
test failure (kernel hung) for all ASIC's. This is how this
regression was found.

Signed-off-by: Vitaly Prosyak <vitaly.prosyak at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 06aba201d4db..8a1047224000 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2226,6 +2226,8 @@ amdgpu_pci_remove(struct pci_dev *pdev)
 	struct drm_device *dev = pci_get_drvdata(pdev);
 	struct amdgpu_device *adev = drm_to_adev(dev);
 
+	drm_dev_unplug(dev);
+
 	if (adev->pm.rpm_mode != AMDGPU_RUNPM_NONE) {
 		pm_runtime_get_sync(dev->dev);
 		pm_runtime_forbid(dev->dev);
@@ -2265,7 +2267,7 @@ amdgpu_pci_remove(struct pci_dev *pdev)
 
 	amdgpu_driver_unload_kms(dev);
 
-	drm_dev_unplug(dev);
+
 
 	/*
 	 * Flush any in flight DMA operations from device.
-- 
2.25.1