[Qemu-devel] [PATCH 2/9] vring: introduce vring_restore() to restore from img

[Liu Ping Fan]

From: Liu Ping Fan <address@hidden>

Re-initialize the members of vring correctly is required when
restored from img.

Signed-off-by: Liu Ping Fan <address@hidden>
---
 hw/dataplane/vring.c |    6 ++++++
 hw/dataplane/vring.h |    1 +
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/hw/dataplane/vring.c b/hw/dataplane/vring.c
index 865bd4d..0a540b4 100644
--- a/hw/dataplane/vring.c
+++ b/hw/dataplane/vring.c
@@ -48,6 +48,12 @@ bool vring_setup(Vring *vring, VirtIODevice *vdev, int n)
     return true;
 }
 
+void vring_restore(Vring *vring, uint16_t last_avail_idx)
+{
+    vring->last_avail_idx = last_avail_idx;
+    vring->last_used_idx = vring->vr.used->idx;
+}
+
 void vring_teardown(Vring *vring)
 {
     hostmem_finalize(&vring->hostmem);
diff --git a/hw/dataplane/vring.h b/hw/dataplane/vring.h
index 0d00500..9938bf9 100644
--- a/hw/dataplane/vring.h
+++ b/hw/dataplane/vring.h
@@ -49,6 +49,7 @@ static inline void vring_set_broken(Vring *vring)
     vring->broken = true;
 }
 
+void vring_restore(Vring *vring, uint16_t last_avail_idx);
 bool vring_setup(Vring *vring, VirtIODevice *vdev, int n);
 void vring_teardown(Vring *vring);
 void vring_disable_notification(VirtIODevice *vdev, Vring *vring);
-- 
1.7.4.4