[PATCH AUTOSEL 6.6 40/47] drm/amdgpu: Add NULL checks for function pointers

Sasha Levin
2023-12-11T13:56:55Z

From: Lijo Lazar <lijo.lazar@amd.com>

[ Upstream commit 81577503efb49f4ad76af22f9941d72900ef4aab ]

Check if function is implemented before making the call.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 f5be40d7ba367..e9c42186a6a25 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -1416,9 +1416,11 @@ 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 (adev->ip_versions[MP0_HWIP][0] != IP_VERSION(13, 0, 2)) {

@@ -1434,9 +1436,11 @@ 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,
--
2.42.0