bdrv_set_backing_hd() is a function that explicitly cares about the
bs->backing child. Highlight that in its description and use
child_bs(bs->backing) instead of backing_bs(bs) to make it more obvious.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block.c b/block.c
index f3e2aae49c..d139ffb57d 100644
--- a/block.c
+++ b/block.c
@@ -2846,7 +2846,7 @@ static BdrvChildRole bdrv_backing_role(BlockDriverState
*bs)
}
/*
- * Sets the backing file link of a BDS. A new reference is created; callers
+ * Sets the bs->backing link of a BDS. A new reference is created; callers
* which don't need their own reference any more must call bdrv_unref().
*/
void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd,
@@ -2855,7 +2855,7 @@ void bdrv_set_backing_hd(BlockDriverState *bs,
BlockDriverState *backing_hd,
bool update_inherits_from = bdrv_chain_contains(bs, backing_hd) &&
bdrv_inherits_from_recursive(backing_hd, bs);
- if (bdrv_is_backing_chain_frozen(bs, backing_bs(bs), errp)) {
+ if (bdrv_is_backing_chain_frozen(bs, child_bs(bs->backing), errp)) {
return;
}