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-rw-r--r--block/bio.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/block/bio.c b/block/bio.c
index 445be4bdd99b..3ac72e60e7f1 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -945,9 +945,6 @@ static inline bool page_is_mergeable(const struct bio_vec *bv,
static bool __bio_try_merge_page(struct bio *bio, struct page *page,
unsigned int len, unsigned int off, bool *same_page)
{
- if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)))
- return false;
-
if (bio->bi_vcnt > 0) {
struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
@@ -1127,6 +1124,9 @@ int bio_add_page(struct bio *bio, struct page *page,
{
bool same_page = false;
+ if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)))
+ return 0;
+
if (!__bio_try_merge_page(bio, page, len, offset, &same_page)) {
if (bio_full(bio, len))
return 0;
@@ -1335,6 +1335,9 @@ int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
{
int ret = 0;
+ if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)))
+ return -EIO;
+
if (iov_iter_is_bvec(iter)) {
bio_iov_bvec_set(bio, iter);
iov_iter_advance(iter, bio->bi_iter.bi_size);