drm/amdgpu: make function pointers mandatory

We always want those to be setup correctly.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -468,8 +468,7 @@ static const struct amdgpu_ih_funcs cik_ih_funcs = {
 
 static void cik_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 {
-	if (adev->irq.ih_funcs == NULL)
-		adev->irq.ih_funcs = &cik_ih_funcs;
+	adev->irq.ih_funcs = &cik_ih_funcs;
 }
 
 const struct amdgpu_ip_block_version cik_ih_ip_block =

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

@@ -1370,10 +1370,8 @@ static const struct amdgpu_buffer_funcs cik_sdma_buffer_funcs = {
 
 static void cik_sdma_set_buffer_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mman.buffer_funcs == NULL) {
-		adev->mman.buffer_funcs = &cik_sdma_buffer_funcs;
-		adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
-	}
+	adev->mman.buffer_funcs = &cik_sdma_buffer_funcs;
+	adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
 }
 
 static const struct amdgpu_vm_pte_funcs cik_sdma_vm_pte_funcs = {
@@ -1389,15 +1387,13 @@ static void cik_sdma_set_vm_pte_funcs(struct amdgpu_device *adev)
 	struct drm_gpu_scheduler *sched;
 	unsigned i;
 
-	if (adev->vm_manager.vm_pte_funcs == NULL) {
-		adev->vm_manager.vm_pte_funcs = &cik_sdma_vm_pte_funcs;
-		for (i = 0; i < adev->sdma.num_instances; i++) {
-			sched = &adev->sdma.instance[i].ring.sched;
-			adev->vm_manager.vm_pte_rqs[i] =
-				&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
-		}
-		adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
+	adev->vm_manager.vm_pte_funcs = &cik_sdma_vm_pte_funcs;
+	for (i = 0; i < adev->sdma.num_instances; i++) {
+		sched = &adev->sdma.instance[i].ring.sched;
+		adev->vm_manager.vm_pte_rqs[i] =
+			&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
 	}
+	adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
 }
 
 const struct amdgpu_ip_block_version cik_sdma_ip_block =

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

@@ -449,8 +449,7 @@ static const struct amdgpu_ih_funcs cz_ih_funcs = {
 
 static void cz_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 {
-	if (adev->irq.ih_funcs == NULL)
-		adev->irq.ih_funcs = &cz_ih_funcs;
+	adev->irq.ih_funcs = &cz_ih_funcs;
 }
 
 const struct amdgpu_ip_block_version cz_ih_ip_block =

drivers/gpu/drm/amd/amdgpu/dce_v10_0.c

@@ -3570,8 +3570,7 @@ static const struct amdgpu_display_funcs dce_v10_0_display_funcs = {
 
 static void dce_v10_0_set_display_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mode_info.funcs == NULL)
-		adev->mode_info.funcs = &dce_v10_0_display_funcs;
+	adev->mode_info.funcs = &dce_v10_0_display_funcs;
 }
 
 static const struct amdgpu_irq_src_funcs dce_v10_0_crtc_irq_funcs = {

drivers/gpu/drm/amd/amdgpu/dce_v11_0.c

@@ -3702,8 +3702,7 @@ static const struct amdgpu_display_funcs dce_v11_0_display_funcs = {
 
 static void dce_v11_0_set_display_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mode_info.funcs == NULL)
-		adev->mode_info.funcs = &dce_v11_0_display_funcs;
+	adev->mode_info.funcs = &dce_v11_0_display_funcs;
 }
 
 static const struct amdgpu_irq_src_funcs dce_v11_0_crtc_irq_funcs = {

drivers/gpu/drm/amd/amdgpu/dce_v6_0.c

@@ -3376,8 +3376,7 @@ static const struct amdgpu_display_funcs dce_v6_0_display_funcs = {
 
 static void dce_v6_0_set_display_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mode_info.funcs == NULL)
-		adev->mode_info.funcs = &dce_v6_0_display_funcs;
+	adev->mode_info.funcs = &dce_v6_0_display_funcs;
 }
 
 static const struct amdgpu_irq_src_funcs dce_v6_0_crtc_irq_funcs = {

drivers/gpu/drm/amd/amdgpu/dce_v8_0.c

@@ -3458,8 +3458,7 @@ static const struct amdgpu_display_funcs dce_v8_0_display_funcs = {
 
 static void dce_v8_0_set_display_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mode_info.funcs == NULL)
-		adev->mode_info.funcs = &dce_v8_0_display_funcs;
+	adev->mode_info.funcs = &dce_v8_0_display_funcs;
 }
 
 static const struct amdgpu_irq_src_funcs dce_v8_0_crtc_irq_funcs = {

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

@@ -649,8 +649,7 @@ static const struct amdgpu_display_funcs dce_virtual_display_funcs = {
 
 static void dce_virtual_set_display_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mode_info.funcs == NULL)
-		adev->mode_info.funcs = &dce_virtual_display_funcs;
+	adev->mode_info.funcs = &dce_virtual_display_funcs;
 }
 
 static int dce_virtual_pageflip(struct amdgpu_device *adev,

drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c

@@ -1180,8 +1180,7 @@ static const struct amdgpu_irq_src_funcs gmc_v6_0_irq_funcs = {
 
 static void gmc_v6_0_set_gmc_funcs(struct amdgpu_device *adev)
 {
-	if (adev->gmc.gmc_funcs == NULL)
-		adev->gmc.gmc_funcs = &gmc_v6_0_gmc_funcs;
+	adev->gmc.gmc_funcs = &gmc_v6_0_gmc_funcs;
 }
 
 static void gmc_v6_0_set_irq_funcs(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c

@@ -1388,8 +1388,7 @@ static const struct amdgpu_irq_src_funcs gmc_v7_0_irq_funcs = {
 
 static void gmc_v7_0_set_gmc_funcs(struct amdgpu_device *adev)
 {
-	if (adev->gmc.gmc_funcs == NULL)
-		adev->gmc.gmc_funcs = &gmc_v7_0_gmc_funcs;
+	adev->gmc.gmc_funcs = &gmc_v7_0_gmc_funcs;
 }
 
 static void gmc_v7_0_set_irq_funcs(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c

@@ -1733,8 +1733,7 @@ static const struct amdgpu_irq_src_funcs gmc_v8_0_irq_funcs = {
 
 static void gmc_v8_0_set_gmc_funcs(struct amdgpu_device *adev)
 {
-	if (adev->gmc.gmc_funcs == NULL)
-		adev->gmc.gmc_funcs = &gmc_v8_0_gmc_funcs;
+	adev->gmc.gmc_funcs = &gmc_v8_0_gmc_funcs;
 }
 
 static void gmc_v8_0_set_irq_funcs(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -593,8 +593,7 @@ static const struct amdgpu_gmc_funcs gmc_v9_0_gmc_funcs = {
 
 static void gmc_v9_0_set_gmc_funcs(struct amdgpu_device *adev)
 {
-	if (adev->gmc.gmc_funcs == NULL)
-		adev->gmc.gmc_funcs = &gmc_v9_0_gmc_funcs;
+	adev->gmc.gmc_funcs = &gmc_v9_0_gmc_funcs;
 }
 
 static int gmc_v9_0_early_init(void *handle)

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

@@ -447,8 +447,7 @@ static const struct amdgpu_ih_funcs iceland_ih_funcs = {
 
 static void iceland_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 {
-	if (adev->irq.ih_funcs == NULL)
-		adev->irq.ih_funcs = &iceland_ih_funcs;
+	adev->irq.ih_funcs = &iceland_ih_funcs;
 }
 
 const struct amdgpu_ip_block_version iceland_ih_ip_block =

drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c

@@ -1296,10 +1296,8 @@ static const struct amdgpu_buffer_funcs sdma_v2_4_buffer_funcs = {
 
 static void sdma_v2_4_set_buffer_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mman.buffer_funcs == NULL) {
-		adev->mman.buffer_funcs = &sdma_v2_4_buffer_funcs;
-		adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
-	}
+	adev->mman.buffer_funcs = &sdma_v2_4_buffer_funcs;
+	adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
 }
 
 static const struct amdgpu_vm_pte_funcs sdma_v2_4_vm_pte_funcs = {
@@ -1315,15 +1313,13 @@ static void sdma_v2_4_set_vm_pte_funcs(struct amdgpu_device *adev)
 	struct drm_gpu_scheduler *sched;
 	unsigned i;
 
-	if (adev->vm_manager.vm_pte_funcs == NULL) {
-		adev->vm_manager.vm_pte_funcs = &sdma_v2_4_vm_pte_funcs;
-		for (i = 0; i < adev->sdma.num_instances; i++) {
-			sched = &adev->sdma.instance[i].ring.sched;
-			adev->vm_manager.vm_pte_rqs[i] =
-				&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
-		}
-		adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
+	adev->vm_manager.vm_pte_funcs = &sdma_v2_4_vm_pte_funcs;
+	for (i = 0; i < adev->sdma.num_instances; i++) {
+		sched = &adev->sdma.instance[i].ring.sched;
+		adev->vm_manager.vm_pte_rqs[i] =
+			&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
 	}
+	adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
 }
 
 const struct amdgpu_ip_block_version sdma_v2_4_ip_block =

drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c

@@ -1736,10 +1736,8 @@ static const struct amdgpu_buffer_funcs sdma_v3_0_buffer_funcs = {
 
 static void sdma_v3_0_set_buffer_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mman.buffer_funcs == NULL) {
-		adev->mman.buffer_funcs = &sdma_v3_0_buffer_funcs;
-		adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
-	}
+	adev->mman.buffer_funcs = &sdma_v3_0_buffer_funcs;
+	adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
 }
 
 static const struct amdgpu_vm_pte_funcs sdma_v3_0_vm_pte_funcs = {
@@ -1755,15 +1753,13 @@ static void sdma_v3_0_set_vm_pte_funcs(struct amdgpu_device *adev)
 	struct drm_gpu_scheduler *sched;
 	unsigned i;
 
-	if (adev->vm_manager.vm_pte_funcs == NULL) {
-		adev->vm_manager.vm_pte_funcs = &sdma_v3_0_vm_pte_funcs;
-		for (i = 0; i < adev->sdma.num_instances; i++) {
-			sched = &adev->sdma.instance[i].ring.sched;
-			adev->vm_manager.vm_pte_rqs[i] =
-				&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
-		}
-		adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
+	adev->vm_manager.vm_pte_funcs = &sdma_v3_0_vm_pte_funcs;
+	for (i = 0; i < adev->sdma.num_instances; i++) {
+		sched = &adev->sdma.instance[i].ring.sched;
+		adev->vm_manager.vm_pte_rqs[i] =
+			&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
 	}
+	adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
 }
 
 const struct amdgpu_ip_block_version sdma_v3_0_ip_block =

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

@@ -1807,10 +1807,8 @@ static const struct amdgpu_buffer_funcs sdma_v4_0_buffer_funcs = {
 
 static void sdma_v4_0_set_buffer_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mman.buffer_funcs == NULL) {
-		adev->mman.buffer_funcs = &sdma_v4_0_buffer_funcs;
-		adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
-	}
+	adev->mman.buffer_funcs = &sdma_v4_0_buffer_funcs;
+	adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
 }
 
 static const struct amdgpu_vm_pte_funcs sdma_v4_0_vm_pte_funcs = {
@@ -1826,15 +1824,13 @@ static void sdma_v4_0_set_vm_pte_funcs(struct amdgpu_device *adev)
 	struct drm_gpu_scheduler *sched;
 	unsigned i;
 
-	if (adev->vm_manager.vm_pte_funcs == NULL) {
-		adev->vm_manager.vm_pte_funcs = &sdma_v4_0_vm_pte_funcs;
-		for (i = 0; i < adev->sdma.num_instances; i++) {
-			sched = &adev->sdma.instance[i].ring.sched;
-			adev->vm_manager.vm_pte_rqs[i] =
-				&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
-		}
-		adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
+	adev->vm_manager.vm_pte_funcs = &sdma_v4_0_vm_pte_funcs;
+	for (i = 0; i < adev->sdma.num_instances; i++) {
+		sched = &adev->sdma.instance[i].ring.sched;
+		adev->vm_manager.vm_pte_rqs[i] =
+			&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
 	}
+	adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
 }
 
 const struct amdgpu_ip_block_version sdma_v4_0_ip_block = {

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

@@ -863,10 +863,8 @@ static const struct amdgpu_buffer_funcs si_dma_buffer_funcs = {
 
 static void si_dma_set_buffer_funcs(struct amdgpu_device *adev)
 {
-	if (adev->mman.buffer_funcs == NULL) {
-		adev->mman.buffer_funcs = &si_dma_buffer_funcs;
-		adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
-	}
+	adev->mman.buffer_funcs = &si_dma_buffer_funcs;
+	adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
 }
 
 static const struct amdgpu_vm_pte_funcs si_dma_vm_pte_funcs = {
@@ -882,15 +880,13 @@ static void si_dma_set_vm_pte_funcs(struct amdgpu_device *adev)
 	struct drm_gpu_scheduler *sched;
 	unsigned i;
 
-	if (adev->vm_manager.vm_pte_funcs == NULL) {
-		adev->vm_manager.vm_pte_funcs = &si_dma_vm_pte_funcs;
-		for (i = 0; i < adev->sdma.num_instances; i++) {
-			sched = &adev->sdma.instance[i].ring.sched;
-			adev->vm_manager.vm_pte_rqs[i] =
-				&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
-		}
-		adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
+	adev->vm_manager.vm_pte_funcs = &si_dma_vm_pte_funcs;
+	for (i = 0; i < adev->sdma.num_instances; i++) {
+		sched = &adev->sdma.instance[i].ring.sched;
+		adev->vm_manager.vm_pte_rqs[i] =
+			&sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
 	}
+	adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
 }
 
 const struct amdgpu_ip_block_version si_dma_ip_block =

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

@@ -308,8 +308,7 @@ static const struct amdgpu_ih_funcs si_ih_funcs = {
 
 static void si_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 {
-	if (adev->irq.ih_funcs == NULL)
-		adev->irq.ih_funcs = &si_ih_funcs;
+	adev->irq.ih_funcs = &si_ih_funcs;
 }
 
 const struct amdgpu_ip_block_version si_ih_ip_block =

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

@@ -513,8 +513,7 @@ static const struct amdgpu_ih_funcs tonga_ih_funcs = {
 
 static void tonga_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 {
-	if (adev->irq.ih_funcs == NULL)
-		adev->irq.ih_funcs = &tonga_ih_funcs;
+	adev->irq.ih_funcs = &tonga_ih_funcs;
 }
 
 const struct amdgpu_ip_block_version tonga_ih_ip_block =

drivers/gpu/drm/amd/amdgpu/vega10_ih.c

@@ -494,8 +494,7 @@ static const struct amdgpu_ih_funcs vega10_ih_funcs = {
 
 static void vega10_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 {
-	if (adev->irq.ih_funcs == NULL)
-		adev->irq.ih_funcs = &vega10_ih_funcs;
+	adev->irq.ih_funcs = &vega10_ih_funcs;
 }
 
 const struct amdgpu_ip_block_version vega10_ih_ip_block =