diff options
| -rw-r--r-- | blockdev.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c index d4ef6cd452..4cd9a58d36 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1731,6 +1731,8 @@ static void external_snapshot_abort(BlkActionState *common) if (state->new_bs) { if (state->overlay_appended) { AioContext *aio_context; + AioContext *tmp_context; + int ret; aio_context = bdrv_get_aio_context(state->old_bs); aio_context_acquire(aio_context); @@ -1738,6 +1740,25 @@ static void external_snapshot_abort(BlkActionState *common) bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd() close state->old_bs; we need it */ bdrv_set_backing_hd(state->new_bs, NULL, &error_abort); + + /* + * The call to bdrv_set_backing_hd() above returns state->old_bs to + * the main AioContext. As we're still going to be using it, return + * it to the AioContext it was before. + */ + tmp_context = bdrv_get_aio_context(state->old_bs); + if (aio_context != tmp_context) { + aio_context_release(aio_context); + aio_context_acquire(tmp_context); + + ret = bdrv_try_set_aio_context(state->old_bs, + aio_context, NULL); + assert(ret == 0); + + aio_context_release(tmp_context); + aio_context_acquire(aio_context); + } + bdrv_replace_node(state->new_bs, state->old_bs, &error_abort); bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */ |