[RFC PATCH 05/12] vdpa: add vhost_vdpa_set_vring_ready_internal

["Eugenio Pérez" <eperezma@redhat.com>]

Reset a virtqueue reuses this call with .num = 0, so let's make it
possible to use that way.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 hw/virtio/vhost-vdpa.c | 12 +++++++++---
 hw/virtio/trace-events |  2 +-
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index f51f5d9969..e7ab69165c 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -528,19 +528,25 @@ int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range)
     return ret < 0 ? -errno : 0;
 }
 
-int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx)
+static int vhost_vdpa_set_vring_ready_internal(struct vhost_vdpa *v,
+                                               unsigned idx, bool enable)
 {
     struct vhost_dev *dev = v->dev;
     struct vhost_vring_state state = {
         .index = idx,
-        .num = 1,
+        .num = enable,
     };
     int r = vhost_vdpa_call(dev, VHOST_VDPA_SET_VRING_ENABLE, &state);
 
-    trace_vhost_vdpa_set_vring_ready(dev, idx, r);
+    trace_vhost_vdpa_set_vring_ready(dev, idx, enable, r);
     return r;
 }
 
+int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx)
+{
+    return vhost_vdpa_set_vring_ready_internal(v, idx, true);
+}
+
 /*
  * The use of this function is for requests that only need to be
  * applied once. Typically such request occurs at the beginning
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 4f6a6ba428..9b90da73af 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -46,7 +46,7 @@ vhost_vdpa_set_features(void *dev, uint64_t features) "dev: %p features: 0x%"PRI
 vhost_vdpa_get_device_id(void *dev, uint32_t device_id) "dev: %p device_id %"PRIu32
 vhost_vdpa_reset_device(void *dev, uint8_t status) "dev: %p status: 0x%"PRIx8
 vhost_vdpa_get_vq_index(void *dev, int idx, int vq_idx) "dev: %p idx: %d vq idx: %d"
-vhost_vdpa_set_vring_ready(void *dev, unsigned i, int r) "dev: %p, idx: %u, r: %d"
+vhost_vdpa_set_vring_ready(void *dev, unsigned i, bool e, int r) "dev: %p, idx: %u, num: %d, r: %d"
 vhost_vdpa_dump_config(void *dev, const char *line) "dev: %p %s"
 vhost_vdpa_set_config(void *dev, uint32_t offset, uint32_t size, uint32_t flags) "dev: %p offset: %"PRIu32" size: %"PRIu32" flags: 0x%"PRIx32
 vhost_vdpa_get_config(void *dev, void *config, uint32_t config_len) "dev: %p config: %p config_len: %"PRIu32
-- 
2.39.3