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virtio_ring: factor out split detaching logic

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This patch factors out the split core detaching logic that could be
reused by in order feature into a dedicated function.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-19-jasowang@redhat.com>
This commit is contained in:
Jason Wang
2025-12-30 14:46:48 +08:00
committed by Michael S. Tsirkin
parent 9dc6b944f1
commit 519b206e30
1 changed files with 14 additions and 4 deletions
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18
drivers/virtio/virtio_ring.c
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@@ -805,8 +805,9 @@ static void detach_indirect_split(struct vring_virtqueue *vq,
vq->split.desc_state[head].indir_desc = NULL;
}
static void detach_buf_split(struct vring_virtqueue *vq, unsigned int head,
void **ctx)
static unsigned detach_buf_split_in_order(struct vring_virtqueue *vq,
unsigned int head,
void **ctx)
{
struct vring_desc_extra *extra;
unsigned int i;
@@ -826,8 +827,6 @@ static void detach_buf_split(struct vring_virtqueue *vq, unsigned int head,
}
vring_unmap_one_split(vq, &extra[i]);
extra[i].next = vq->free_head;
vq->free_head = head;
/* Plus final descriptor */
vq->vq.num_free++;
@@ -836,6 +835,17 @@ static void detach_buf_split(struct vring_virtqueue *vq, unsigned int head,
detach_indirect_split(vq, head);
else if (ctx)
*ctx = vq->split.desc_state[head].indir_desc;
return i;
}
static void detach_buf_split(struct vring_virtqueue *vq, unsigned int head,
void **ctx)
{
unsigned int i = detach_buf_split_in_order(vq, head, ctx);
vq->split.desc_extra[i].next = vq->free_head;
vq->free_head = head;
}
static bool virtqueue_poll_split(const struct vring_virtqueue *vq,