> if (bio->bi_bdev) {
> size_t trim = size & (bdev_logical_block_size(bio->bi_bdev) - 1);
> - iov_iter_revert(iter, trim);
> - size -= trim;
> +
> + if (trim) {
> + iov_iter_revert(iter, trim);
> + size -= trim;
> + }
We also need to fix this. This isn't supposed to be called without
a bdev set, but Kent broke this. But if we don't have a bdev
we need to pass the block size manually and still do the revert if needed.
