drm/amdgpu: validate suspend before function call

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

Use the helper function amdgpu_ip_block_suspend where
same checks and calls are repeated.

Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/aldebaran.c

@@ -85,16 +85,9 @@ 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);
+		r = amdgpu_ip_block_suspend(&adev->ip_blocks[i]);
+		if (r)
 			return r;
-		}
-
-		adev->ip_blocks[i].status.hw = false;
 	}
 
 	return 0;

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -363,6 +363,7 @@ int amdgpu_device_ip_wait_for_idle(struct amdgpu_device *adev,
 				   enum amd_ip_block_type block_type);
 bool amdgpu_device_ip_is_valid(struct amdgpu_device *adev,
 			      enum amd_ip_block_type block_type);
+int amdgpu_ip_block_suspend(struct amdgpu_ip_block *ip_block);
 
 #define AMDGPU_MAX_IP_NUM 16
 

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -272,6 +272,24 @@ void amdgpu_reg_state_sysfs_fini(struct amdgpu_device *adev)
 	sysfs_remove_bin_file(&adev->dev->kobj, &bin_attr_reg_state);
 }
 
+int amdgpu_ip_block_suspend(struct amdgpu_ip_block *ip_block)
+{
+	int r;
+
+	if (ip_block->version->funcs->suspend) {
+		r = ip_block->version->funcs->suspend(ip_block);
+		if (r) {
+			dev_err(ip_block->adev->dev,
+				"suspend of IP block <%s> failed %d\n",
+				ip_block->version->funcs->name, r);
+			return r;
+		}
+	}
+
+	ip_block->status.hw = false;
+	return 0;
+}
+
 /**
  * DOC: board_info
  *
@@ -3473,15 +3491,9 @@ 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);
+		r = amdgpu_ip_block_suspend(&adev->ip_blocks[i]);
+		if (r)
 			return r;
-		}
-
-		adev->ip_blocks[i].status.hw = false;
 	}
 
 	return 0;
@@ -3555,13 +3567,9 @@ 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);
-		}
+		r = amdgpu_ip_block_suspend(&adev->ip_blocks[i]);
 		adev->ip_blocks[i].status.hw = false;
+
 		/* handle putting the SMC in the appropriate state */
 		if (!amdgpu_sriov_vf(adev)) {
 			if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) {

drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c

@@ -28,7 +28,7 @@
 
 static int amdgpu_reset_xgmi_reset_on_init_suspend(struct amdgpu_device *adev)
 {
-	int i, r;
+	int i;
 
 	for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
 		if (!adev->ip_blocks[i].status.valid)
@@ -40,12 +40,7 @@ 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);
-		}
+		amdgpu_ip_block_suspend(&adev->ip_blocks[i]);
 		adev->ip_blocks[i].status.hw = false;
 	}
 

drivers/gpu/drm/amd/amdgpu/sienna_cichlid.c

@@ -81,15 +81,9 @@ 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);
+		r = amdgpu_ip_block_suspend(&adev->ip_blocks[i]);
+		if (r)
 			return r;
-		}
-		adev->ip_blocks[i].status.hw = false;
 	}
 
 	return 0;

drivers/gpu/drm/amd/amdgpu/smu_v13_0_10.c

@@ -80,15 +80,9 @@ 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);
+		r = amdgpu_ip_block_suspend(&adev->ip_blocks[i]);
+		if (r)
 			return r;
-		}
-		adev->ip_blocks[i].status.hw = false;
 	}
 
 	return 0;