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virtio: make virtio_delete_queue idempotent

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Let's make sure calling this twice is harmless -
no known instances, but seems safer.

Suggested-by: Pan Nengyuan <pannengyuan@huawei.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 8cd353ea0f)
*prereq for 421afd2fe8
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Michael S. Tsirkin
2019-12-09 11:47:24 -05:00
committed by Michael Roth
parent d5a5d43e27
commit a843731d7f
1 changed files with 1 additions and 0 deletions
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hw/virtio/virtio.c
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@@ -2337,6 +2337,7 @@ void virtio_delete_queue(VirtQueue *vq)
vq->handle_output = NULL;
vq->handle_aio_output = NULL;
g_free(vq->used_elems);
vq->used_elems = NULL;
}
void virtio_del_queue(VirtIODevice *vdev, int n)