diff options
| -rw-r--r-- | block/nbd.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/block/nbd.c b/block/nbd.c index bcd6641e90..b3cbbeb4b0 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -250,13 +250,15 @@ static void nbd_client_attach_aio_context_bh(void *opaque) BlockDriverState *bs = opaque; BDRVNBDState *s = (BDRVNBDState *)bs->opaque; - /* - * The node is still drained, so we know the coroutine has yielded in - * nbd_read_eof(), the only place where bs->in_flight can reach 0, or it is - * entered for the first time. Both places are safe for entering the - * coroutine. - */ - qemu_aio_coroutine_enter(bs->aio_context, s->connection_co); + if (s->connection_co) { + /* + * The node is still drained, so we know the coroutine has yielded in + * nbd_read_eof(), the only place where bs->in_flight can reach 0, or + * it is entered for the first time. Both places are safe for entering + * the coroutine. + */ + qemu_aio_coroutine_enter(bs->aio_context, s->connection_co); + } bdrv_dec_in_flight(bs); } |