mp_bvec_for_each_page() may miss the 1st page in case that the bvec
ends before last byte of the 1st PAGE.
So fix it by checking against the last page.
Fixes: 05d5585e42a399700 ("block: introduce mp_bvec_for_each_page() for iterating over page")
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
include/linux/bvec.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index 98a140fa4dac..85894d5000a1 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -197,7 +197,7 @@ static inline void mp_bvec_last_segment(const struct bio_vec *bvec,
#define mp_bvec_for_each_page(pg, bv, i) \
for (i = (bv)->bv_offset / PAGE_SIZE; \
- (i < (((bv)->bv_offset + (bv)->bv_len) / PAGE_SIZE)) && \
+ (i <= (((bv)->bv_offset + (bv)->bv_len - 1) / PAGE_SIZE)) && \
(pg = bvec_nth_page((bv)->bv_page, i)); i += 1)
#endif /* __LINUX_BVEC_ITER_H */
--
2.9.5
