drm/amdgpu: simplify the return expression

Simplify the return expression.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

@@ -4726,7 +4726,6 @@ static void gfx_v10_0_gpu_early_init(struct amdgpu_device *adev)
 static int gfx_v10_0_gfx_ring_init(struct amdgpu_device *adev, int ring_id,
 				   int me, int pipe, int queue)
 {
-	int r;
 	struct amdgpu_ring *ring;
 	unsigned int irq_type;
 
@@ -4746,17 +4745,13 @@ static int gfx_v10_0_gfx_ring_init(struct amdgpu_device *adev, int ring_id,
 	sprintf(ring->name, "gfx_%d.%d.%d", ring->me, ring->pipe, ring->queue);
 
 	irq_type = AMDGPU_CP_IRQ_GFX_ME0_PIPE0_EOP + ring->pipe;
-	r = amdgpu_ring_init(adev, ring, 1024, &adev->gfx.eop_irq, irq_type,
+	return amdgpu_ring_init(adev, ring, 1024, &adev->gfx.eop_irq, irq_type,
 			     AMDGPU_RING_PRIO_DEFAULT, NULL);
-	if (r)
-		return r;
-	return 0;
 }
 
 static int gfx_v10_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
 				       int mec, int pipe, int queue)
 {
-	int r;
 	unsigned irq_type;
 	struct amdgpu_ring *ring;
 	unsigned int hw_prio;
@@ -4781,12 +4776,8 @@ static int gfx_v10_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
 	hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring) ?
 			AMDGPU_RING_PRIO_2 : AMDGPU_RING_PRIO_DEFAULT;
 	/* type-2 packets are deprecated on MEC, use type-3 instead */
-	r = amdgpu_ring_init(adev, ring, 1024, &adev->gfx.eop_irq, irq_type,
+	return amdgpu_ring_init(adev, ring, 1024, &adev->gfx.eop_irq, irq_type,
 			     hw_prio, NULL);
-	if (r)
-		return r;
-
-	return 0;
 }
 
 static int gfx_v10_0_sw_init(void *handle)