6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lijo Lazar <lijo.lazar@xxxxxxx>
[ Upstream commit 74fa02c4a5ea1ade5156a6ce494d3ea83881c2d8 ]
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.
Fixes: 5c03e5843e6b ("drm/amdgpu:add smu mode1/2 support for aldebaran")
Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
Reviewed-by: Feifei Xu <Feifei.Xu@xxxxxxx>
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 062d78818da16..e1227b7c71b16 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4685,11 +4685,14 @@ 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);
--
2.43.0
