On Wed, 6 Jun 2018 08:26:56 -0600 Jens Axboe <axboe@xxxxxxxxx> wrote: > On 6/6/18 8:22 AM, Hannes Reinecke wrote: > > blk_partition_remap() will only clear bi_partno if an actual > > remapping has happened. But flush request et al don't have an > > actual size, so the remapping doesn't happen and bi_partno is never > > cleared. So for stacked devices blk_partition_remap() will be > > called on each level. If (as is the case for native nvme > > multipathing) one of the lower-level devices do _not_support > > partitioning a spurious I/O error is generated. > > Just move it down, we're now clearing it for both cases. > > diff --git a/block/blk-core.c b/block/blk-core.c > index 3f56be15f17e..cf0ee764b908 100644 > --- a/block/blk-core.c > +++ b/block/blk-core.c > @@ -2220,10 +2220,10 @@ static inline int blk_partition_remap(struct > bio *bio) if (bio_check_eod(bio, part_nr_sects_read(p))) > goto out; > bio->bi_iter.bi_sector += p->start_sect; > - bio->bi_partno = 0; > trace_block_bio_remap(bio->bi_disk->queue, bio, > part_devt(p), bio->bi_iter.bi_sector - p->start_sect); > } > + bio->bi_partno = 0; > ret = 0; > out: > rcu_read_unlock(); > Okay, will be resending. Cheers, Hannes
