drm/radeon: remove radeon_fence_create

It is completely unnecessary to create fences
before they are emitted, so remove it and a bunch
of checks if fences are emitted or not.
Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

drivers/gpu/drm/radeon/evergreen.c

@@ -1371,7 +1371,7 @@ void evergreen_mc_program(struct radeon_device *rdev)
  */
 void evergreen_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
 {
-	struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
+	struct radeon_ring *ring = &rdev->ring[ib->ring];
 
 	/* set to DX10/11 mode */
 	radeon_ring_write(ring, PACKET3(PACKET3_MODE_CONTROL, 0));

drivers/gpu/drm/radeon/ni.c

@@ -850,7 +850,7 @@ void cayman_fence_ring_emit(struct radeon_device *rdev,
 
 void cayman_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
 {
-	struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
+	struct radeon_ring *ring = &rdev->ring[ib->ring];
 
 	/* set to DX10/11 mode */
 	radeon_ring_write(ring, PACKET3(PACKET3_MODE_CONTROL, 0));

drivers/gpu/drm/radeon/r100.c

@@ -883,7 +883,7 @@ int r100_copy_blit(struct radeon_device *rdev,
 		   uint64_t src_offset,
 		   uint64_t dst_offset,
 		   unsigned num_gpu_pages,
-		   struct radeon_fence *fence)
+		   struct radeon_fence **fence)
 {
 	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
 	uint32_t cur_pages;
@@ -947,7 +947,7 @@ int r100_copy_blit(struct radeon_device *rdev,
 			  RADEON_WAIT_HOST_IDLECLEAN |
 			  RADEON_WAIT_DMA_GUI_IDLE);
 	if (fence) {
-		r = radeon_fence_emit(rdev, fence);
+		r = radeon_fence_emit(rdev, fence, RADEON_RING_TYPE_GFX_INDEX);
 	}
 	radeon_ring_unlock_commit(rdev, ring);
 	return r;

drivers/gpu/drm/radeon/r200.c

@@ -85,7 +85,7 @@ int r200_copy_dma(struct radeon_device *rdev,
 		  uint64_t src_offset,
 		  uint64_t dst_offset,
 		  unsigned num_gpu_pages,
-		  struct radeon_fence *fence)
+		  struct radeon_fence **fence)
 {
 	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
 	uint32_t size;
@@ -120,7 +120,7 @@ int r200_copy_dma(struct radeon_device *rdev,
 	radeon_ring_write(ring, PACKET0(RADEON_WAIT_UNTIL, 0));
 	radeon_ring_write(ring, RADEON_WAIT_DMA_GUI_IDLE);
 	if (fence) {
-		r = radeon_fence_emit(rdev, fence);
+		r = radeon_fence_emit(rdev, fence, RADEON_RING_TYPE_GFX_INDEX);
 	}
 	radeon_ring_unlock_commit(rdev, ring);
 	return r;

drivers/gpu/drm/radeon/r600.c

@@ -2309,7 +2309,7 @@ int r600_copy_blit(struct radeon_device *rdev,
 		   uint64_t src_offset,
 		   uint64_t dst_offset,
 		   unsigned num_gpu_pages,
-		   struct radeon_fence *fence)
+		   struct radeon_fence **fence)
 {
 	struct radeon_sa_bo *vb = NULL;
 	int r;
@@ -2607,7 +2607,7 @@ void r600_fini(struct radeon_device *rdev)
  */
 void r600_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
 {
-	struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
+	struct radeon_ring *ring = &rdev->ring[ib->ring];
 
 	/* FIXME: implement */
 	radeon_ring_write(ring, PACKET3(PACKET3_INDIRECT_BUFFER, 2));

drivers/gpu/drm/radeon/r600_blit_kms.c

@@ -703,20 +703,20 @@ int r600_blit_prepare_copy(struct radeon_device *rdev, unsigned num_gpu_pages,
 	return 0;
 }
 
-void r600_blit_done_copy(struct radeon_device *rdev, struct radeon_fence *fence,
+void r600_blit_done_copy(struct radeon_device *rdev, struct radeon_fence **fence,
 			 struct radeon_sa_bo *vb)
 {
 	struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];
 	int r;
 
-	r = radeon_fence_emit(rdev, fence);
+	r = radeon_fence_emit(rdev, fence, RADEON_RING_TYPE_GFX_INDEX);
 	if (r) {
 		radeon_ring_unlock_undo(rdev, ring);
 		return;
 	}
 
 	radeon_ring_unlock_commit(rdev, ring);
-	radeon_sa_bo_free(rdev, &vb, fence);
+	radeon_sa_bo_free(rdev, &vb, *fence);
 }
 
 void r600_kms_blit_copy(struct radeon_device *rdev,

drivers/gpu/drm/radeon/radeon.h

@@ -113,7 +113,6 @@ extern int radeon_lockup_timeout;
 
 /* fence seq are set to this number when signaled */
 #define RADEON_FENCE_SIGNALED_SEQ		0LL
-#define RADEON_FENCE_NOTEMITED_SEQ		(~0LL)
 
 /* internal ring indices */
 /* r1xx+ has gfx CP ring */
@@ -277,8 +276,7 @@ struct radeon_fence {
 int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring);
 int radeon_fence_driver_init(struct radeon_device *rdev);
 void radeon_fence_driver_fini(struct radeon_device *rdev);
-int radeon_fence_create(struct radeon_device *rdev, struct radeon_fence **fence, int ring);
-int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence *fence);
+int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence **fence, int ring);
 void radeon_fence_process(struct radeon_device *rdev, int ring);
 bool radeon_fence_signaled(struct radeon_fence *fence);
 int radeon_fence_wait(struct radeon_fence *fence, bool interruptible);
@@ -630,6 +628,7 @@ struct radeon_ib {
 	uint32_t			length_dw;
 	uint64_t			gpu_addr;
 	uint32_t			*ptr;
+	int				ring;
 	struct radeon_fence		*fence;
 	unsigned			vm_id;
 	bool				is_const_ib;
@@ -1192,20 +1191,20 @@ struct radeon_asic {
 			    uint64_t src_offset,
 			    uint64_t dst_offset,
 			    unsigned num_gpu_pages,
-			    struct radeon_fence *fence);
+			    struct radeon_fence **fence);
 		u32 blit_ring_index;
 		int (*dma)(struct radeon_device *rdev,
 			   uint64_t src_offset,
 			   uint64_t dst_offset,
 			   unsigned num_gpu_pages,
-			   struct radeon_fence *fence);
+			   struct radeon_fence **fence);
 		u32 dma_ring_index;
 		/* method used for bo copy */
 		int (*copy)(struct radeon_device *rdev,
 			    uint64_t src_offset,
 			    uint64_t dst_offset,
 			    unsigned num_gpu_pages,
-			    struct radeon_fence *fence);
+			    struct radeon_fence **fence);
 		/* ring used for bo copies */
 		u32 copy_ring_index;
 	} copy;

drivers/gpu/drm/radeon/radeon_asic.h

@@ -79,7 +79,7 @@ int r100_copy_blit(struct radeon_device *rdev,
 		   uint64_t src_offset,
 		   uint64_t dst_offset,
 		   unsigned num_gpu_pages,
-		   struct radeon_fence *fence);
+		   struct radeon_fence **fence);
 int r100_set_surface_reg(struct radeon_device *rdev, int reg,
 			 uint32_t tiling_flags, uint32_t pitch,
 			 uint32_t offset, uint32_t obj_size);
@@ -144,7 +144,7 @@ extern int r200_copy_dma(struct radeon_device *rdev,
 			 uint64_t src_offset,
 			 uint64_t dst_offset,
 			 unsigned num_gpu_pages,
-			 struct radeon_fence *fence);
+			 struct radeon_fence **fence);
 void r200_set_safe_registers(struct radeon_device *rdev);
 
 /*
@@ -318,7 +318,7 @@ void r600_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib);
 int r600_ring_test(struct radeon_device *rdev, struct radeon_ring *cp);
 int r600_copy_blit(struct radeon_device *rdev,
 		   uint64_t src_offset, uint64_t dst_offset,
-		   unsigned num_gpu_pages, struct radeon_fence *fence);
+		   unsigned num_gpu_pages, struct radeon_fence **fence);
 void r600_hpd_init(struct radeon_device *rdev);
 void r600_hpd_fini(struct radeon_device *rdev);
 bool r600_hpd_sense(struct radeon_device *rdev, enum radeon_hpd_id hpd);
@@ -364,7 +364,7 @@ void r600_hdmi_update_audio_settings(struct drm_encoder *encoder);
 /* r600 blit */
 int r600_blit_prepare_copy(struct radeon_device *rdev, unsigned num_gpu_pages,
 			   struct radeon_sa_bo **vb);
-void r600_blit_done_copy(struct radeon_device *rdev, struct radeon_fence *fence,
+void r600_blit_done_copy(struct radeon_device *rdev, struct radeon_fence **fence,
 			 struct radeon_sa_bo *vb);
 void r600_kms_blit_copy(struct radeon_device *rdev,
 			u64 src_gpu_addr, u64 dst_gpu_addr,

drivers/gpu/drm/radeon/radeon_benchmark.c

@@ -45,20 +45,14 @@ static int radeon_benchmark_do_move(struct radeon_device *rdev, unsigned size,
 	for (i = 0; i < n; i++) {
 		switch (flag) {
 		case RADEON_BENCHMARK_COPY_DMA:
-			r = radeon_fence_create(rdev, &fence, radeon_copy_dma_ring_index(rdev));
-			if (r)
-				return r;
 			r = radeon_copy_dma(rdev, saddr, daddr,
 					    size / RADEON_GPU_PAGE_SIZE,
-					    fence);
+					    &fence);
 			break;
 		case RADEON_BENCHMARK_COPY_BLIT:
-			r = radeon_fence_create(rdev, &fence, radeon_copy_blit_ring_index(rdev));
-			if (r)
-				return r;
 			r = radeon_copy_blit(rdev, saddr, daddr,
 					     size / RADEON_GPU_PAGE_SIZE,
-					     fence);
+					     &fence);
 			break;
 		default:
 			DRM_ERROR("Unknown copy method\n");

drivers/gpu/drm/radeon/radeon_fence.c

@@ -61,15 +61,21 @@ static u32 radeon_fence_read(struct radeon_device *rdev, int ring)
 	return seq;
 }
 
-int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence *fence)
+int radeon_fence_emit(struct radeon_device *rdev,
+		      struct radeon_fence **fence,
+		      int ring)
 {
 	/* we are protected by the ring emission mutex */
-	if (fence->seq && fence->seq < RADEON_FENCE_NOTEMITED_SEQ) {
-		return 0;
+	*fence = kmalloc(sizeof(struct radeon_fence), GFP_KERNEL);
+	if ((*fence) == NULL) {
+		return -ENOMEM;
 	}
-	fence->seq = ++rdev->fence_drv[fence->ring].seq;
-	radeon_fence_ring_emit(rdev, fence->ring, fence);
-	trace_radeon_fence_emit(rdev->ddev, fence->seq);
+	kref_init(&((*fence)->kref));
+	(*fence)->rdev = rdev;
+	(*fence)->seq = ++rdev->fence_drv[ring].seq;
+	(*fence)->ring = ring;
+	radeon_fence_ring_emit(rdev, ring, *fence);
+	trace_radeon_fence_emit(rdev->ddev, (*fence)->seq);
 	return 0;
 }
 
@@ -138,25 +144,9 @@ static void radeon_fence_destroy(struct kref *kref)
 	struct radeon_fence *fence;
 
 	fence = container_of(kref, struct radeon_fence, kref);
-	fence->seq = RADEON_FENCE_NOTEMITED_SEQ;
 	kfree(fence);
 }
 
-int radeon_fence_create(struct radeon_device *rdev,
-			struct radeon_fence **fence,
-			int ring)
-{
-	*fence = kmalloc(sizeof(struct radeon_fence), GFP_KERNEL);
-	if ((*fence) == NULL) {
-		return -ENOMEM;
-	}
-	kref_init(&((*fence)->kref));
-	(*fence)->rdev = rdev;
-	(*fence)->seq = RADEON_FENCE_NOTEMITED_SEQ;
-	(*fence)->ring = ring;
-	return 0;
-}
-
 static bool radeon_fence_seq_signaled(struct radeon_device *rdev,
 				      u64 seq, unsigned ring)
 {
@@ -176,10 +166,6 @@ bool radeon_fence_signaled(struct radeon_fence *fence)
 	if (!fence) {
 		return true;
 	}
-	if (fence->seq == RADEON_FENCE_NOTEMITED_SEQ) {
-		WARN(1, "Querying an unemitted fence : %p !\n", fence);
-		return true;
-	}
 	if (fence->seq == RADEON_FENCE_SIGNALED_SEQ) {
 		return true;
 	}
@@ -444,9 +430,7 @@ int radeon_fence_wait_any(struct radeon_device *rdev,
 			return 0;
 		}
 
-		if (fences[i]->seq < RADEON_FENCE_NOTEMITED_SEQ) {
-			seq[i] = fences[i]->seq;
-		}
+		seq[i] = fences[i]->seq;
 	}
 
 	r = radeon_fence_wait_any_seq(rdev, seq, intr);

drivers/gpu/drm/radeon/radeon_ring.c

@@ -49,13 +49,9 @@ int radeon_ib_get(struct radeon_device *rdev, int ring,
 		dev_err(rdev->dev, "failed to get a new IB (%d)\n", r);
 		return r;
 	}
-	r = radeon_fence_create(rdev, &ib->fence, ring);
-	if (r) {
-		dev_err(rdev->dev, "failed to create fence for new IB (%d)\n", r);
-		radeon_sa_bo_free(rdev, &ib->sa_bo, NULL);
-		return r;
-	}
 
+	ib->ring = ring;
+	ib->fence = NULL;
 	ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo);
 	ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo);
 	ib->vm_id = 0;
@@ -74,7 +70,7 @@ void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib)
 
 int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib)
 {
-	struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
+	struct radeon_ring *ring = &rdev->ring[ib->ring];
 	int r = 0;
 
 	if (!ib->length_dw || !ring->ready) {
@@ -89,8 +85,13 @@ int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib)
 		dev_err(rdev->dev, "scheduling IB failed (%d).\n", r);
 		return r;
 	}
-	radeon_ring_ib_execute(rdev, ib->fence->ring, ib);
-	radeon_fence_emit(rdev, ib->fence);
+	radeon_ring_ib_execute(rdev, ib->ring, ib);
+	r = radeon_fence_emit(rdev, &ib->fence, ib->ring);
+	if (r) {
+		dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r);
+		radeon_ring_unlock_undo(rdev, ring);
+		return r;
+	}
 	radeon_ring_unlock_commit(rdev, ring);
 	return 0;
 }

drivers/gpu/drm/radeon/radeon_sa.c

@@ -349,7 +349,7 @@ void radeon_sa_bo_free(struct radeon_device *rdev, struct radeon_sa_bo **sa_bo,
 
 	sa_manager = (*sa_bo)->manager;
 	spin_lock(&sa_manager->lock);
-	if (fence && fence->seq && fence->seq < RADEON_FENCE_NOTEMITED_SEQ) {
+	if (fence && !radeon_fence_signaled(fence)) {
 		(*sa_bo)->fence = radeon_fence_ref(fence);
 		list_add_tail(&(*sa_bo)->flist,
 			      &sa_manager->flist[fence->ring]);

drivers/gpu/drm/radeon/radeon_test.c

@@ -106,13 +106,7 @@ void radeon_test_moves(struct radeon_device *rdev)
 
 		radeon_bo_kunmap(gtt_obj[i]);
 
-		r = radeon_fence_create(rdev, &fence, RADEON_RING_TYPE_GFX_INDEX);
-		if (r) {
-			DRM_ERROR("Failed to create GTT->VRAM fence %d\n", i);
-			goto out_cleanup;
-		}
-
-		r = radeon_copy(rdev, gtt_addr, vram_addr, size / RADEON_GPU_PAGE_SIZE, fence);
+		r = radeon_copy(rdev, gtt_addr, vram_addr, size / RADEON_GPU_PAGE_SIZE, &fence);
 		if (r) {
 			DRM_ERROR("Failed GTT->VRAM copy %d\n", i);
 			goto out_cleanup;
@@ -155,13 +149,7 @@ void radeon_test_moves(struct radeon_device *rdev)
 
 		radeon_bo_kunmap(vram_obj);
 
-		r = radeon_fence_create(rdev, &fence, RADEON_RING_TYPE_GFX_INDEX);
-		if (r) {
-			DRM_ERROR("Failed to create VRAM->GTT fence %d\n", i);
-			goto out_cleanup;
-		}
-
-		r = radeon_copy(rdev, vram_addr, gtt_addr, size / RADEON_GPU_PAGE_SIZE, fence);
+		r = radeon_copy(rdev, vram_addr, gtt_addr, size / RADEON_GPU_PAGE_SIZE, &fence);
 		if (r) {
 			DRM_ERROR("Failed VRAM->GTT copy %d\n", i);
 			goto out_cleanup;
@@ -245,17 +233,6 @@ void radeon_test_ring_sync(struct radeon_device *rdev,
 	int ridxB = radeon_ring_index(rdev, ringB);
 	int r;
 
-	r = radeon_fence_create(rdev, &fence1, ridxA);
-	if (r) {
-		DRM_ERROR("Failed to create sync fence 1\n");
-		goto out_cleanup;
-	}
-	r = radeon_fence_create(rdev, &fence2, ridxA);
-	if (r) {
-		DRM_ERROR("Failed to create sync fence 2\n");
-		goto out_cleanup;
-	}
-
 	r = radeon_semaphore_create(rdev, &semaphore);
 	if (r) {
 		DRM_ERROR("Failed to create semaphore\n");
@@ -268,9 +245,19 @@ void radeon_test_ring_sync(struct radeon_device *rdev,
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ridxA, semaphore);
-	radeon_fence_emit(rdev, fence1);
+	r = radeon_fence_emit(rdev, &fence1, ridxA);
+	if (r) {
+		DRM_ERROR("Failed to emit fence 1\n");
+		radeon_ring_unlock_undo(rdev, ringA);
+		goto out_cleanup;
+	}
 	radeon_semaphore_emit_wait(rdev, ridxA, semaphore);
-	radeon_fence_emit(rdev, fence2);
+	r = radeon_fence_emit(rdev, &fence2, ridxA);
+	if (r) {
+		DRM_ERROR("Failed to emit fence 2\n");
+		radeon_ring_unlock_undo(rdev, ringA);
+		goto out_cleanup;
+	}
 	radeon_ring_unlock_commit(rdev, ringA);
 
 	mdelay(1000);
@@ -342,17 +329,6 @@ void radeon_test_ring_sync2(struct radeon_device *rdev,
 	bool sigA, sigB;
 	int i, r;
 
-	r = radeon_fence_create(rdev, &fenceA, ridxA);
-	if (r) {
-		DRM_ERROR("Failed to create sync fence 1\n");
-		goto out_cleanup;
-	}
-	r = radeon_fence_create(rdev, &fenceB, ridxB);
-	if (r) {
-		DRM_ERROR("Failed to create sync fence 2\n");
-		goto out_cleanup;
-	}
-
 	r = radeon_semaphore_create(rdev, &semaphore);
 	if (r) {
 		DRM_ERROR("Failed to create semaphore\n");
@@ -365,7 +341,12 @@ void radeon_test_ring_sync2(struct radeon_device *rdev,
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ridxA, semaphore);
-	radeon_fence_emit(rdev, fenceA);
+	r = radeon_fence_emit(rdev, &fenceA, ridxA);
+	if (r) {
+		DRM_ERROR("Failed to emit sync fence 1\n");
+		radeon_ring_unlock_undo(rdev, ringA);
+		goto out_cleanup;
+	}
 	radeon_ring_unlock_commit(rdev, ringA);
 
 	r = radeon_ring_lock(rdev, ringB, 64);
@@ -374,7 +355,12 @@ void radeon_test_ring_sync2(struct radeon_device *rdev,
 		goto out_cleanup;
 	}
 	radeon_semaphore_emit_wait(rdev, ridxB, semaphore);
-	radeon_fence_emit(rdev, fenceB);
+	r = radeon_fence_emit(rdev, &fenceB, ridxB);
+	if (r) {
+		DRM_ERROR("Failed to create sync fence 2\n");
+		radeon_ring_unlock_undo(rdev, ringB);
+		goto out_cleanup;
+	}
 	radeon_ring_unlock_commit(rdev, ringB);
 
 	mdelay(1000);

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -222,15 +222,12 @@ static int radeon_move_blit(struct ttm_buffer_object *bo,
 {
 	struct radeon_device *rdev;
 	uint64_t old_start, new_start;
-	struct radeon_fence *fence, *old_fence;
+	struct radeon_fence *fence;
 	struct radeon_semaphore *sem = NULL;
-	int r;
+	int r, ridx;
 
 	rdev = radeon_get_rdev(bo->bdev);
-	r = radeon_fence_create(rdev, &fence, radeon_copy_ring_index(rdev));
-	if (unlikely(r)) {
-		return r;
-	}
+	ridx = radeon_copy_ring_index(rdev);
 	old_start = old_mem->start << PAGE_SHIFT;
 	new_start = new_mem->start << PAGE_SHIFT;
 
@@ -243,7 +240,6 @@ static int radeon_move_blit(struct ttm_buffer_object *bo,
 		break;
 	default:
 		DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
-		radeon_fence_unref(&fence);
 		return -EINVAL;
 	}
 	switch (new_mem->mem_type) {
@@ -255,42 +251,38 @@ static int radeon_move_blit(struct ttm_buffer_object *bo,
 		break;
 	default:
 		DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
-		radeon_fence_unref(&fence);
 		return -EINVAL;
 	}
-	if (!rdev->ring[radeon_copy_ring_index(rdev)].ready) {
+	if (!rdev->ring[ridx].ready) {
 		DRM_ERROR("Trying to move memory with ring turned off.\n");
-		radeon_fence_unref(&fence);
 		return -EINVAL;
 	}
 
 	BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
 
 	/* sync other rings */
-	old_fence = bo->sync_obj;
-	if (old_fence && old_fence->ring != fence->ring
-	    && !radeon_fence_signaled(old_fence)) {
+	fence = bo->sync_obj;
+	if (fence && fence->ring != ridx
+	    && !radeon_fence_signaled(fence)) {
 		bool sync_to_ring[RADEON_NUM_RINGS] = { };
-		sync_to_ring[old_fence->ring] = true;
+		sync_to_ring[fence->ring] = true;
 
 		r = radeon_semaphore_create(rdev, &sem);
 		if (r) {
-			radeon_fence_unref(&fence);
 			return r;
 		}
 
-		r = radeon_semaphore_sync_rings(rdev, sem,
-						sync_to_ring, fence->ring);
+		r = radeon_semaphore_sync_rings(rdev, sem, sync_to_ring, ridx);
 		if (r) {
 			radeon_semaphore_free(rdev, sem, NULL);
-			radeon_fence_unref(&fence);
 			return r;
 		}
 	}
 
+	fence = NULL;
 	r = radeon_copy(rdev, old_start, new_start,
 			new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE), /* GPU pages */
-			fence);
+			&fence);
 	/* FIXME: handle copy error */
 	r = ttm_bo_move_accel_cleanup(bo, (void *)fence, NULL,
 				      evict, no_wait_reserve, no_wait_gpu, new_mem);

drivers/gpu/drm/radeon/si.c

@@ -1762,7 +1762,7 @@ void si_fence_ring_emit(struct radeon_device *rdev,
  */
 void si_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
 {
-	struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
+	struct radeon_ring *ring = &rdev->ring[ib->ring];
 	u32 header;
 
 	if (ib->is_const_ib)
@@ -2702,7 +2702,7 @@ int si_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib)
 			if (ib->is_const_ib)
 				ret = si_vm_packet3_ce_check(rdev, ib->ptr, &pkt);
 			else {
-				switch (ib->fence->ring) {
+				switch (ib->ring) {
 				case RADEON_RING_TYPE_GFX_INDEX:
 					ret = si_vm_packet3_gfx_check(rdev, ib->ptr, &pkt);
 					break;
@@ -2711,7 +2711,7 @@ int si_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib)
 					ret = si_vm_packet3_compute_check(rdev, ib->ptr, &pkt);
 					break;
 				default:
-					dev_err(rdev->dev, "Non-PM4 ring %d !\n", ib->fence->ring);
+					dev_err(rdev->dev, "Non-PM4 ring %d !\n", ib->ring);
 					ret = -EINVAL;
 					break;
 				}