[PATCH 1/3] drm/amdgpu: Add NULL checks for function pointers

[Lijo Lazar]

Check if function is implemented before making the call.

Signed-off-by: Lijo Lazar <lijo.la...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/soc15.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c 
b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 9ad4d6d3122b..9043ebf1e161 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -1424,9 +1424,11 @@ static void soc15_common_get_clockgating_state(void 
*handle, u64 *flags)
        if (amdgpu_sriov_vf(adev))
                *flags = 0;
 
-       adev->nbio.funcs->get_clockgating_state(adev, flags);
+       if (adev->nbio.funcs && adev->nbio.funcs->get_clockgating_state)
+               adev->nbio.funcs->get_clockgating_state(adev, flags);
 
-       adev->hdp.funcs->get_clock_gating_state(adev, flags);
+       if (adev->hdp.funcs && adev->hdp.funcs->get_clock_gating_state)
+               adev->hdp.funcs->get_clock_gating_state(adev, flags);
 
        if (amdgpu_ip_version(adev, MP0_HWIP, 0) != IP_VERSION(13, 0, 2)) {
                /* AMD_CG_SUPPORT_DRM_MGCG */
@@ -1441,9 +1443,11 @@ static void soc15_common_get_clockgating_state(void 
*handle, u64 *flags)
        }
 
        /* AMD_CG_SUPPORT_ROM_MGCG */
-       adev->smuio.funcs->get_clock_gating_state(adev, flags);
+       if (adev->smuio.funcs && adev->smuio.funcs->get_clock_gating_state)
+               adev->smuio.funcs->get_clock_gating_state(adev, flags);
 
-       adev->df.funcs->get_clockgating_state(adev, flags);
+       if (adev->df.funcs && adev->df.funcs->get_clockgating_state)
+               adev->df.funcs->get_clockgating_state(adev, flags);
 }
 
 static int soc15_common_set_powergating_state(void *handle,
-- 
2.25.1