repository: /home/vadimr/shares/kvm-guest-drivers-windows
branch: XP
commit 6906acfc2d5f58df43ebc9c190e1447ff6e63a01
Author: Vadim Rozenfeld<[email protected]>
Date: Sun Nov 1 11:54:03 2009 +0200
[PATCH] viostor driver.Add memory read barrier - synch with fix for Linux guests
by Michael S. Tsirkin<[email protected]>
Signed-off-by: Vadim Rozenfeld<[email protected]>
diff --git a/viostor/virtio_ring.c b/viostor/virtio_ring.c
index d099bb8..2911cef 100644
--- a/viostor/virtio_ring.c
+++ b/viostor/virtio_ring.c
@@ -237,6 +237,8 @@ vring_get_buf(
return NULL;
}
+ rmb();
+
i = vq->vring.used->ring[vq->last_used_idx%vq->vring.num].id;
*len = vq->vring.used->ring[vq->last_used_idx%vq->vring.num].len;
diff --git a/viostor/virtio_ring.c b/viostor/virtio_ring.c
index d099bb8..2911cef 100644
--- a/viostor/virtio_ring.c
+++ b/viostor/virtio_ring.c
@@ -237,6 +237,8 @@ vring_get_buf(
return NULL;
}
+ rmb();
+
i = vq->vring.used->ring[vq->last_used_idx%vq->vring.num].id;
*len = vq->vring.used->ring[vq->last_used_idx%vq->vring.num].len;
