[PATCH 2/2] drm/amdgpu: Fix null point errro

[Rex Zhu]

need to check adev->powerplay.pp_funcs first, becasue from
AI, the smu ip may be disabled by user, and the pp_handle
is null in this case.

Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c    | 6 ++++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c    | 2 +-
 drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c    | 2 +-
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c     | 6 ++++--
 5 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
index 297a549..0a4fba1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
@@ -135,7 +135,8 @@ static int acp_poweroff(struct generic_pm_domain *genpd)
 	 * 2. power off the acp tiles
 	 * 3. check and enter ulv state
 	 */
-		if (adev->powerplay.pp_funcs->set_powergating_by_smu)
+		if (adev->powerplay.pp_funcs &&
+			adev->powerplay.pp_funcs->set_powergating_by_smu)
 			amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, true);
 	}
 	return 0;
@@ -517,7 +518,8 @@ static int acp_set_powergating_state(void *handle,
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	bool enable = state == AMD_PG_STATE_GATE ? true : false;
 
-	if (adev->powerplay.pp_funcs->set_powergating_by_smu)
+	if (adev->powerplay.pp_funcs &&
+		adev->powerplay.pp_funcs->set_powergating_by_smu)
 		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_ACP, enable);
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 4fca67a..7dad682 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1783,6 +1783,7 @@ static int amdgpu_device_set_pg_state(struct amdgpu_device *adev, enum amd_power
 		    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_VCE ||
 		    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_VCN ||
 		    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_ACP) &&
+		    adev->powerplay.pp_funcs &&
 		    adev->powerplay.pp_funcs->set_powergating_by_smu) {
 			if (!adev->ip_blocks[i].status.valid) {
 				amdgpu_dpm_set_powergating_by_smu(adev, adev->ip_blocks[i].version->type, state == AMD_PG_STATE_GATE ?
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index 790fd54..1a656b8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -392,7 +392,7 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 	if (!(adev->powerplay.pp_feature & PP_GFXOFF_MASK))
 		return;
 
-	if (!adev->powerplay.pp_funcs->set_powergating_by_smu)
+	if (!adev->powerplay.pp_funcs || !adev->powerplay.pp_funcs->set_powergating_by_smu)
 		return;
 
 
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
index 14649f8..fd23ba1 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c
@@ -280,7 +280,7 @@ void mmhub_v1_0_update_power_gating(struct amdgpu_device *adev,
 		return;
 
 	if (enable && adev->pg_flags & AMD_PG_SUPPORT_MMHUB) {
-		if (adev->powerplay.pp_funcs->set_powergating_by_smu)
+		if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->set_powergating_by_smu)
 			amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GMC, true);
 
 	}
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 2e8365d..d97e6a2 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1595,7 +1595,8 @@ static int sdma_v4_0_hw_init(void *handle)
 	int r;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs->set_powergating_by_smu)
+	if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs &&
+			adev->powerplay.pp_funcs->set_powergating_by_smu)
 		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_SDMA, false);
 
 	sdma_v4_0_init_golden_registers(adev);
@@ -1615,7 +1616,8 @@ static int sdma_v4_0_hw_fini(void *handle)
 	sdma_v4_0_ctx_switch_enable(adev, false);
 	sdma_v4_0_enable(adev, false);
 
-	if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs->set_powergating_by_smu)
+	if (adev->asic_type == CHIP_RAVEN && adev->powerplay.pp_funcs
+			&& adev->powerplay.pp_funcs->set_powergating_by_smu)
 		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_SDMA, true);
 
 	return 0;
-- 
1.9.1