drm/amdgpu: Add NULL check for asic_funcs

If driver load fails too early, asic_funcs pointer remains unassigned.
Add NULL check to sanitize unwind path.

Signed-off-by: Lijo Lazar <[e-mail]>
Acked-by: Alex Deucher <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>
(cherry picked from commit 582bf7c5158dce16f7dc5b8345b7876bd8031224)
Cc: [e-mail]

drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c

···
 
 bool amdgpu_nbio_is_replay_cnt_supported(struct amdgpu_device *adev)
 {
-	if (amdgpu_sriov_vf(adev) || !adev->asic_funcs->get_pcie_replay_count ||
+	if (amdgpu_sriov_vf(adev) || !adev->asic_funcs ||
+	    !adev->asic_funcs->get_pcie_replay_count ||
 	    (!adev->nbio.funcs || !adev->nbio.funcs->get_pcie_replay_count))
 		return false;