virtio_ring: split: __vring_new_virtqueue() accept struct vring_virtqueue_split

__vring_new_virtqueue() instead accepts struct vring_virtqueue_split.

The purpose of this is to pass more information into
__vring_new_virtqueue() to make the code simpler and the structure
cleaner.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-9-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/virtio/virtio_ring.c

@@ -205,7 +205,7 @@ struct vring_virtqueue {
 };
 
 static struct virtqueue *__vring_new_virtqueue(unsigned int index,
-					       struct vring vring,
+					       struct vring_virtqueue_split *vring_split,
 					       struct virtio_device *vdev,
 					       bool weak_barriers,
 					       bool context,
@@ -949,6 +949,7 @@ static struct virtqueue *vring_create_virtqueue_split(
 	void (*callback)(struct virtqueue *),
 	const char *name)
 {
+	struct vring_virtqueue_split vring_split = {};
 	struct virtqueue *vq;
 	void *queue = NULL;
 	dma_addr_t dma_addr;
@@ -984,10 +985,10 @@ static struct virtqueue *vring_create_virtqueue_split(
 		return NULL;
 
 	queue_size_in_bytes = vring_size(num, vring_align);
-	vring_init(&vring, num, queue, vring_align);
+	vring_init(&vring_split.vring, num, queue, vring_align);
 
-	vq = __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
-				   notify, callback, name);
+	vq = __vring_new_virtqueue(index, &vring_split, vdev, weak_barriers,
+				   context, notify, callback, name);
 	if (!vq) {
 		vring_free_queue(vdev, queue_size_in_bytes, queue,
 				 dma_addr);
@@ -2204,7 +2205,7 @@ EXPORT_SYMBOL_GPL(vring_interrupt);
 
 /* Only available for split ring */
 static struct virtqueue *__vring_new_virtqueue(unsigned int index,
-					       struct vring vring,
+					       struct vring_virtqueue_split *vring_split,
 					       struct virtio_device *vdev,
 					       bool weak_barriers,
 					       bool context,
@@ -2246,7 +2247,7 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
 	vq->split.queue_dma_addr = 0;
 	vq->split.queue_size_in_bytes = 0;
 
-	vq->split.vring = vring;
+	vq->split.vring = vring_split->vring;
 	vq->split.avail_flags_shadow = 0;
 	vq->split.avail_idx_shadow = 0;
 
@@ -2258,21 +2259,21 @@ static struct virtqueue *__vring_new_virtqueue(unsigned int index,
 					vq->split.avail_flags_shadow);
 	}
 
-	vq->split.desc_state = kmalloc_array(vring.num,
+	vq->split.desc_state = kmalloc_array(vring_split->vring.num,
 			sizeof(struct vring_desc_state_split), GFP_KERNEL);
 	if (!vq->split.desc_state)
 		goto err_state;
 
-	vq->split.desc_extra = vring_alloc_desc_extra(vring.num);
+	vq->split.desc_extra = vring_alloc_desc_extra(vring_split->vring.num);
 	if (!vq->split.desc_extra)
 		goto err_extra;
 
 	/* Put everything in free lists. */
 	vq->free_head = 0;
-	memset(vq->split.desc_state, 0, vring.num *
+	memset(vq->split.desc_state, 0, vring_split->vring.num *
 			sizeof(struct vring_desc_state_split));
 
-	virtqueue_init(vq, vring.num);
+	virtqueue_init(vq, vring_split->vring.num);
 
 	spin_lock(&vdev->vqs_list_lock);
 	list_add_tail(&vq->vq.list, &vdev->vqs);
@@ -2322,14 +2323,14 @@ struct virtqueue *vring_new_virtqueue(unsigned int index,
 				      void (*callback)(struct virtqueue *vq),
 				      const char *name)
 {
-	struct vring vring;
+	struct vring_virtqueue_split vring_split = {};
 
 	if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED))
 		return NULL;
 
-	vring_init(&vring, num, pages, vring_align);
-	return __vring_new_virtqueue(index, vring, vdev, weak_barriers, context,
-				     notify, callback, name);
+	vring_init(&vring_split.vring, num, pages, vring_align);
+	return __vring_new_virtqueue(index, &vring_split, vdev, weak_barriers,
+				     context, notify, callback, name);
 }
 EXPORT_SYMBOL_GPL(vring_new_virtqueue);