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virtio_ring: factor out core logic of buffer detaching

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Factor out core logic of buffer detaching and leave the free list
management to the caller so in_order can just call the core logic.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-16-jasowang@redhat.com>
This commit is contained in:
Jason Wang
2025-12-30 14:46:45 +08:00
committed by Michael S. Tsirkin
parent 03f05c4eeb
commit c623106c79
1 changed files with 13 additions and 4 deletions
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17
drivers/virtio/virtio_ring.c
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@@ -1665,8 +1665,8 @@ out:
return needs_kick;
}
static void detach_buf_packed(struct vring_virtqueue *vq,
unsigned int id, void **ctx)
static void detach_buf_packed_in_order(struct vring_virtqueue *vq,
unsigned int id, void **ctx)
{
struct vring_desc_state_packed *state = NULL;
struct vring_packed_desc *desc;
@@ -1677,8 +1677,6 @@ static void detach_buf_packed(struct vring_virtqueue *vq,
/* Clear data ptr. */
state->data = NULL;
vq->packed.desc_extra[state->last].next = vq->free_head;
vq->free_head = id;
vq->vq.num_free += state->num;
if (unlikely(vq->use_map_api)) {
@@ -1715,6 +1713,17 @@ static void detach_buf_packed(struct vring_virtqueue *vq,
}
}
static void detach_buf_packed(struct vring_virtqueue *vq,
unsigned int id, void **ctx)
{
struct vring_desc_state_packed *state = &vq->packed.desc_state[id];
vq->packed.desc_extra[state->last].next = vq->free_head;
vq->free_head = id;
detach_buf_packed_in_order(vq, id, ctx);
}
static inline bool is_used_desc_packed(const struct vring_virtqueue *vq,
u16 idx, bool used_wrap_counter)
{