On Fri, Feb 28, 2020 at 01:44:01PM -0600, Goldwyn Rodrigues wrote: > +++ b/fs/iomap/direct-io.c > @@ -264,7 +264,7 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length, > size_t n; > if (dio->error) { > iov_iter_revert(dio->submit.iter, copied); > - copied = ret = 0; > + ret = 0; > goto out; There's another change here ... look at the out label out: /* Undo iter limitation to current extent */ iov_iter_reexpand(dio->submit.iter, orig_count - copied); if (copied) return copied; return ret; so you're also changing by how much the iter is reexpanded. I don't know if it's the appropriate amount; I still don't quite get the iov_iter complexities.