drm/amdgpu: fix dereference after null check

check the pointer hive before use.

Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 77f6fd50002acd823346fd5184473f9ddc27df00..00fe3c2d54310f7d791b8c54c448ef9581cfa22a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5725,7 +5725,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
         * to put adev in the 1st position.
         */
        INIT_LIST_HEAD(&device_list);
-       if (!amdgpu_sriov_vf(adev) && (adev->gmc.xgmi.num_physical_nodes > 1)) {
+       if (!amdgpu_sriov_vf(adev) && (adev->gmc.xgmi.num_physical_nodes > 1) && hive) {
                list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
                        list_add_tail(&tmp_adev->reset_list, &device_list);
                        if (adev->shutdown)