On 2020/06/19 15:59, Johannes Thumshirn wrote: > REQ_OP_ZONE_APPEND bios cannot be split so return EIO if we can't fit it > into one IO. > > Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx> > --- > drivers/md/dm.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/md/dm.c b/drivers/md/dm.c > index 058c34abe9d1..c720a7e3269a 100644 > --- a/drivers/md/dm.c > +++ b/drivers/md/dm.c > @@ -1609,6 +1609,9 @@ static int __split_and_process_non_flush(struct clone_info *ci) > > len = min_t(sector_t, max_io_len(ci->sector, ti), ci->sector_count); > > + if (bio_op(ci->bio) == REQ_OP_ZONE_APPEND && len < ci->sector_count) > + return -EIO; > + > r = __clone_and_map_data_bio(ci, ti, ci->sector, &len); > if (r < 0) > return r; > I think this is OK. The stacked max_zone_append_sectors limit should have prevented that to happen in the first place I think, but better safe than sorry. Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxx> -- Damien Le Moal Western Digital Research
