[v14,28/42] virtio_ring: struct virtqueue introduce reset

Commit Message

Xuan Zhuo Aug. 1, 2022, 6:38 a.m. UTC

Introduce a new member reset to the structure virtqueue to determine
whether the current vq is in the reset state. Subsequent patches will
use it.

Signed-off-by: Xuan Zhuo <[e-mail]>
Acked-by: Jason Wang <[e-mail]>
---
 drivers/virtio/virtio_ring.c | 2 ++
 include/linux/virtio.h       | 2 ++
 2 files changed, 4 insertions(+)

Patch

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index accb3ae6cc95..d66c8e6d0ef3 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1996,6 +1996,7 @@  static struct virtqueue *vring_create_virtqueue_packed(
 	vq->vq.vdev = vdev;
 	vq->vq.name = name;
 	vq->vq.index = index;
+	vq->vq.reset = false;
 	vq->we_own_ring = true;
 	vq->notify = notify;
 	vq->weak_barriers = weak_barriers;
@@ -2481,6 +2482,7 @@  static struct virtqueue *__vring_new_virtqueue(unsigned int index,
 	vq->vq.vdev = vdev;
 	vq->vq.name = name;
 	vq->vq.index = index;
+	vq->vq.reset = false;
 	vq->we_own_ring = false;
 	vq->notify = notify;
 	vq->weak_barriers = weak_barriers;
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index d45ee82a4470..a3f73bb6733e 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -20,6 +20,7 @@ 
  * @index: the zero-based ordinal number for this queue.
  * @num_free: number of elements we expect to be able to fit.
  * @num_max: the maximum number of elements supported by the device.
+ * @reset: vq is in reset state or not.
  *
  * A note on @num_free: with indirect buffers, each buffer needs one
  * element in the queue, otherwise a buffer will need one element per
@@ -34,6 +35,7 @@  struct virtqueue {
 	unsigned int num_free;
 	unsigned int num_max;
 	void *priv;
+	bool reset;
 };
 
 int virtqueue_add_outbuf(struct virtqueue *vq,