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 <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 582bf7c5158dce16f7dc5b8345b7876bd8031224)
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c
index e56ba93a8df6433b12d6f5a48dde66b87591aa77..a974265837f0d451cb7b28bde80b4b3ed0d8bc6e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_nbio.c
@@ -55,7 +55,8 @@ u64 amdgpu_nbio_get_pcie_replay_count(struct amdgpu_device *adev)
 
 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;