[PATCH] drm/amdgpu: Fix pci state save during mode-1 reset

[Lijo Lazar]

Cache the PCI state before bus master is disabled. The saved state is
later used for other cases like restoring config space after mode-2
reset.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
Fixes: 5c03e5843e6b ("drm/amdgpu:add smu mode1/2 support for aldebaran")
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 3fb02f5b91c9..6c2ab14ca102 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5224,11 +5224,14 @@ int amdgpu_device_mode1_reset(struct amdgpu_device *adev)
 
 	dev_info(adev->dev, "GPU mode1 reset\n");
 
+	/* Cache the state before bus master disable. The saved config space
+	 * values are used in other cases like restore after mode-2 reset.
+	 */
+	amdgpu_device_cache_pci_state(adev->pdev);
+
 	/* disable BM */
 	pci_clear_master(adev->pdev);
 
-	amdgpu_device_cache_pci_state(adev->pdev);
-
 	if (amdgpu_dpm_is_mode1_reset_supported(adev)) {
 		dev_info(adev->dev, "GPU smu mode1 reset\n");
 		ret = amdgpu_dpm_mode1_reset(adev);
-- 
2.25.1