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charset="utf-8" bdrv_activate() returns failure without setting an error when !bs->drv. This is suspicious. Turns out it used to succeed then, until commit 5416645fcf82 changed it to return -ENOMEDIUM. Return zero instead. Fixes: 5416645fcf82 (block: return error-code from bdrv_invalidate_cache) Signed-off-by: Markus Armbruster --- block.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block.c b/block.c index 0ece805e41..9855c102de 100644 --- a/block.c +++ b/block.c @@ -6860,7 +6860,7 @@ int bdrv_activate(BlockDriverState *bs, Error **errp) GRAPH_RDLOCK_GUARD_MAINLOOP(); =20 if (!bs->drv) { - return -ENOMEDIUM; + return 0; } =20 QLIST_FOREACH(child, &bs->children, next) { --=20 2.48.1