change qemu_iovec_to_buf() to match other to,from_buf functions

It now allows specifying offset within qiov to start from and
amount of bytes to copy.  Actual implementation is just a call
to iov_to_buf().

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

1 files changed, 1 insertions, 1 deletions

diff --git a/block/rbd.c b/block/rbd.c
index 8bb3252bc3..49a4787b55 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -674,7 +674,7 @@ static BlockDriverAIOCB *rbd_start_aio(BlockDriverState *bs,
     acb->bh = NULL;
 
     if (cmd == RBD_AIO_WRITE) {
-        qemu_iovec_to_buffer(acb->qiov, acb->bounce);
+        qemu_iovec_to_buf(acb->qiov, 0, acb->bounce, qiov->size);
     }
 
     buf = acb->bounce;