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mirror: Fix inconsistent backing AioContext for after mirroring 

mirror_complete opens the backing chain, which should have the same
AioContext as the top when using iothreads. Make the code guarantee
this, which fixes a failed assertion in bdrv_attach_child.

Signed-off-by: sochin.jiang <sochin.jiang@huawei.com>
Message-id: 1498475064-39816-1-git-send-email-sochin.jiang@huawei.com
[mreitz: Reworded commit message]
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
sochin.jiang 2017-06-26 19:04:24 +08:00 committed by Max Reitz
parent a9ed6a9193
commit 5ce6bfe255
1 changed files with 1 additions and 0 deletions
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1
block.c
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@ -2185,6 +2185,7 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
ret = -EINVAL;
goto free_exit;
}
bdrv_set_aio_context(backing_hd, bdrv_get_aio_context(bs));
/* Hook up the backing file link; drop our reference, bs owns the
* backing_hd reference now */