diff options
Diffstat (limited to 'block/bounce.c')
| -rw-r--r-- | block/bounce.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/block/bounce.c b/block/bounce.c index ffb9e9ecfa7e..f8ed677a1bf7 100644 --- a/block/bounce.c +++ b/block/bounce.c @@ -163,13 +163,13 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool) { struct bio *bio_orig = bio->bi_private; struct bio_vec *bvec, orig_vec; - int i; struct bvec_iter orig_iter = bio_orig->bi_iter; + struct bvec_iter_all iter_all; /* * free up bounce indirect pages used */ - bio_for_each_segment_all(bvec, bio, i) { + bio_for_each_segment_all(bvec, bio, iter_all) { orig_vec = bio_iter_iovec(bio_orig, orig_iter); if (bvec->bv_page != orig_vec.bv_page) { dec_zone_page_state(bvec->bv_page, NR_BOUNCE); @@ -313,7 +313,12 @@ 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) { + /* + * 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) |