diff options
| -rw-r--r-- | block/bounce.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/block/bounce.c b/block/bounce.c index add085e28b1d..47eb7e936e22 100644 --- a/block/bounce.c +++ b/block/bounce.c @@ -295,7 +295,6 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, bool bounce = false; int sectors = 0; bool passthrough = bio_is_passthrough(*bio_orig); - struct bvec_iter_all iter_all; bio_for_each_segment(from, *bio_orig, iter) { if (i++ < BIO_MAX_PAGES) @@ -315,7 +314,12 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, bio = bounce_clone_bio(*bio_orig, GFP_NOIO, passthrough ? NULL : &bounce_bio_set); - bio_for_each_segment_all(to, bio, i, iter_all) { + /* + * Bvec table can't be updated by bio_for_each_segment_all(), + * so retrieve bvec from the table directly. This way is safe + * because the 'bio' is single-page bvec. + */ + for (i = 0, to = bio->bi_io_vec; i < bio->bi_vcnt; to++, i++) { struct page *page = to->bv_page; if (page_to_pfn(page) <= q->limits.bounce_pfn) |