block: reset bi_iter.bi_done after splitting bio

After the bio has been updated to represent the remaining sectors, reset bi_done so bio_rewind_iter() does not rewind further than it should. This resolves a bio_integrity_process() failure on reads where the original request was split. Fixes: 63573e3 ("bio-integrity: Restore original iterator on verify stage") Signed-off-by: Greg Edwards <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
ambv · Jul 27, 2018 · 5151842 · 5151842
1 parent 17d51b1
commit 5151842
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/block/bio.c b/block/bio.c
@@ -1893,6 +1893,7 @@ struct bio *bio_split(struct bio *bio, int sectors,
 		bio_integrity_trim(split);
 
 	bio_advance(bio, split->bi_iter.bi_size);
+	bio->bi_iter.bi_done = 0;
 
 	if (bio_flagged(bio, BIO_TRACE_COMPLETION))
 		bio_set_flag(split, BIO_TRACE_COMPLETION);