[PATCH v2 06/14] drm/amdgpu: validate suspend before function call

[Sunil Khatri <sunil.khatri@xxxxxxx>]

Before making a function call to suspend, validate
the function pointer like we do in sw_init.

Signed-off-by: Sunil Khatri <sunil.khatri@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/aldebaran.c      | 15 ++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c  | 26 ++++++++++++---------
 drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c   | 12 ++++++----
 drivers/gpu/drm/amd/amdgpu/sienna_cichlid.c | 15 ++++++------
 drivers/gpu/drm/amd/amdgpu/smu_v13_0_10.c   | 15 ++++++------
 5 files changed, 46 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/aldebaran.c b/drivers/gpu/drm/amd/amdgpu/aldebaran.c
index c1ff24335a0c..e55d680d95ce 100644
--- a/drivers/gpu/drm/amd/amdgpu/aldebaran.c
+++ b/drivers/gpu/drm/amd/amdgpu/aldebaran.c
@@ -85,13 +85,14 @@ static int aldebaran_mode2_suspend_ip(struct amdgpu_device *adev)
 			      AMD_IP_BLOCK_TYPE_SDMA))
 			continue;
 
-		r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
-
-		if (r) {
-			dev_err(adev->dev,
-				"suspend of IP block <%s> failed %d\n",
-				adev->ip_blocks[i].version->funcs->name, r);
-			return r;
+		if (adev->ip_blocks[i].version->funcs->suspend) {
+			r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
+			if (r) {
+				dev_err(adev->dev,
+					"suspend of IP block <%s> failed %d\n",
+					adev->ip_blocks[i].version->funcs->name, r);
+				return r;
+			}
 		}
 
 		adev->ip_blocks[i].status.hw = false;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 340141a74c12..51607ac8adb9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3471,12 +3471,14 @@ static int amdgpu_device_ip_suspend_phase1(struct amdgpu_device *adev)
 			continue;
 
 		/* XXX handle errors */
-		r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
-		/* XXX handle errors */
-		if (r) {
-			DRM_ERROR("suspend of IP block <%s> failed %d\n",
-				  adev->ip_blocks[i].version->funcs->name, r);
-			return r;
+		if (adev->ip_blocks[i].version->funcs->suspend) {
+			r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
+			/* XXX handle errors */
+			if (r) {
+				DRM_ERROR("suspend of IP block <%s> failed %d\n",
+					adev->ip_blocks[i].version->funcs->name, r);
+				return r;
+			}
 		}
 
 		adev->ip_blocks[i].status.hw = false;
@@ -3553,11 +3555,13 @@ static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
 			continue;
 
 		/* XXX handle errors */
-		r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
-		/* XXX handle errors */
-		if (r) {
-			DRM_ERROR("suspend of IP block <%s> failed %d\n",
-				  adev->ip_blocks[i].version->funcs->name, r);
+		if (adev->ip_blocks[i].version->funcs->suspend) {
+			r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
+			/* XXX handle errors */
+			if (r) {
+				DRM_ERROR("suspend of IP block <%s> failed %d\n",
+					adev->ip_blocks[i].version->funcs->name, r);
+			}
 		}
 		adev->ip_blocks[i].status.hw = false;
 		/* handle putting the SMC in the appropriate state */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
index 3e2724590dbf..6bc75aa1c3b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
@@ -40,11 +40,13 @@ static int amdgpu_reset_xgmi_reset_on_init_suspend(struct amdgpu_device *adev)
 			continue;
 
 		/* XXX handle errors */
-		r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
-		/* XXX handle errors */
-		if (r) {
-			dev_err(adev->dev, "suspend of IP block <%s> failed %d",
-				adev->ip_blocks[i].version->funcs->name, r);
+		if (adev->ip_blocks[i].version->funcs->suspend) {
+			r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
+			/* XXX handle errors */
+			if (r) {
+				dev_err(adev->dev, "suspend of IP block <%s> failed %d",
+					adev->ip_blocks[i].version->funcs->name, r);
+			}
 		}
 		adev->ip_blocks[i].status.hw = false;
 	}
diff --git a/drivers/gpu/drm/amd/amdgpu/sienna_cichlid.c b/drivers/gpu/drm/amd/amdgpu/sienna_cichlid.c
index 475b7df3a908..10dece12509f 100644
--- a/drivers/gpu/drm/amd/amdgpu/sienna_cichlid.c
+++ b/drivers/gpu/drm/amd/amdgpu/sienna_cichlid.c
@@ -81,13 +81,14 @@ static int sienna_cichlid_mode2_suspend_ip(struct amdgpu_device *adev)
 			      AMD_IP_BLOCK_TYPE_SDMA))
 			continue;
 
-		r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
-
-		if (r) {
-			dev_err(adev->dev,
-				"suspend of IP block <%s> failed %d\n",
-				adev->ip_blocks[i].version->funcs->name, r);
-			return r;
+		if (adev->ip_blocks[i].version->funcs->suspend) {
+			r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
+			if (r) {
+				dev_err(adev->dev,
+					"suspend of IP block <%s> failed %d\n",
+					adev->ip_blocks[i].version->funcs->name, r);
+				return r;
+			}
 		}
 		adev->ip_blocks[i].status.hw = false;
 	}
diff --git a/drivers/gpu/drm/amd/amdgpu/smu_v13_0_10.c b/drivers/gpu/drm/amd/amdgpu/smu_v13_0_10.c
index 5ea9090b5040..ab049f0b4d39 100644
--- a/drivers/gpu/drm/amd/amdgpu/smu_v13_0_10.c
+++ b/drivers/gpu/drm/amd/amdgpu/smu_v13_0_10.c
@@ -80,13 +80,14 @@ static int smu_v13_0_10_mode2_suspend_ip(struct amdgpu_device *adev)
 			      AMD_IP_BLOCK_TYPE_MES))
 			continue;
 
-		r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
-
-		if (r) {
-			dev_err(adev->dev,
-				"suspend of IP block <%s> failed %d\n",
-				adev->ip_blocks[i].version->funcs->name, r);
-			return r;
+		if (adev->ip_blocks[i].version->funcs->suspend) {
+			r = adev->ip_blocks[i].version->funcs->suspend(&adev->ip_blocks[i]);
+			if (r) {
+				dev_err(adev->dev,
+					"suspend of IP block <%s> failed %d\n",
+					adev->ip_blocks[i].version->funcs->name, r);
+				return r;
+			}
 		}
 		adev->ip_blocks[i].status.hw = false;
 	}
-- 
2.34.1