On Tue, Apr 05, 2016 at 07:20:51PM +0800, Fam Zheng wrote:
> See patch 1 for the bug analysis.
> 
> v3: Make bdrv_co_drain a public function and use it directly in block/mirror.c.
>     [Stefan]
> 
> 
> 
> Fam Zheng (2):
>   block: Fix bdrv_drain in coroutine
>   mirror: Replace bdrv_drain(bs) with bdrv_co_drain(bs)
> 
>  block/io.c            | 45 +++++++++++++++++++++++++++++++++++++++++++++
>  block/mirror.c        |  2 +-
>  include/block/block.h |  1 +
>  3 files changed, 47 insertions(+), 1 deletion(-)
> 
> -- 
> 2.7.4
> 
> 

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan