File 0307-virtio-decrement-vq-inuse-in-virtqu.patch of Package qemu.4227

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File 0307-virtio-decrement-vq-inuse-in-virtqu.patch of Package qemu.4227

From c1073ebc5b2be6eeb89ec158dd1904de2e121dd4 Mon Sep 17 00:00:00 2001
From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Mon, 15 Aug 2016 13:54:16 +0100
Subject: [PATCH] virtio: decrement vq->inuse in virtqueue_discard()

virtqueue_discard() moves vq->last_avail_idx back so the element can be
popped again.  It's necessary to decrement vq->inuse to avoid "leaking"
the element count.

Cc: qemu-stable@nongnu.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 58a83c61496eeb0d31571a07a51bc1947e3379ac)
[BR: BSC#1015048]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/virtio/virtio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 4f0fdf168d..9f1e86b2b7 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -271,6 +271,7 @@ void virtqueue_discard(VirtQueue *vq, const VirtQueueElement *elem,
                        unsigned int len)
 {
     vq->last_avail_idx--;
+    vq->inuse--;
     virtqueue_unmap_sg(vq, elem, len);
 }

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File 0307-virtio-decrement-vq-inuse-in-virtqu.patch of Package qemu.4227

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