virtio-blk: fix comment for virtio_blk_rw_complete as nalloc is initially -1
The initial value of nalloc is -1, but not 1. Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-id: 1541479952-32355-1-git-send-email-dongli.zhang@oracle.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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@ -96,7 +96,7 @@ static void virtio_blk_rw_complete(void *opaque, int ret)
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trace_virtio_blk_rw_complete(vdev, req, ret);
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if (req->qiov.nalloc != -1) {
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/* If nalloc is != 1 req->qiov is a local copy of the original
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/* If nalloc is != -1 req->qiov is a local copy of the original
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* external iovec. It was allocated in submit_requests to be
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* able to merge requests. */
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qemu_iovec_destroy(&req->qiov);
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