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-rw-r--r--block/bio.c51
1 files changed, 25 insertions, 26 deletions
diff --git a/block/bio.c b/block/bio.c
index 6f9f883f9a65..d6eb90d9b20b 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -965,7 +965,7 @@ int bio_add_hw_page(struct request_queue *q, struct bio *bio,
* would create a gap, disallow it.
*/
bvec = &bio->bi_io_vec[bio->bi_vcnt - 1];
- if (bvec_gap_to_prev(q, bvec, offset))
+ if (bvec_gap_to_prev(&q->limits, bvec, offset))
return 0;
}
@@ -1151,22 +1151,12 @@ void bio_iov_bvec_set(struct bio *bio, struct iov_iter *iter)
bio_set_flag(bio, BIO_CLONED);
}
-static void bio_put_pages(struct page **pages, size_t size, size_t off)
-{
- size_t i, nr = DIV_ROUND_UP(size + (off & ~PAGE_MASK), PAGE_SIZE);
-
- for (i = 0; i < nr; i++)
- put_page(pages[i]);
-}
-
static int bio_iov_add_page(struct bio *bio, struct page *page,
unsigned int len, unsigned int offset)
{
bool same_page = false;
if (!__bio_try_merge_page(bio, page, len, offset, &same_page)) {
- if (WARN_ON_ONCE(bio_full(bio, len)))
- return -EINVAL;
__bio_add_page(bio, page, len, offset);
return 0;
}
@@ -1209,8 +1199,9 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt;
struct page **pages = (struct page **)bv;
ssize_t size, left;
- unsigned len, i;
+ unsigned len, i = 0;
size_t offset;
+ int ret = 0;
/*
* Move page array up in the allocated memory for the bio vecs as far as
@@ -1227,32 +1218,40 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
* result to ensure the bio's total size is correct. The remainder of
* the iov data will be picked up in the next bio iteration.
*/
- size = iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset);
- if (size > 0)
+ size = iov_iter_get_pages(iter, pages, UINT_MAX - bio->bi_iter.bi_size,
+ nr_pages, &offset);
+ if (size > 0) {
+ nr_pages = DIV_ROUND_UP(offset + size, PAGE_SIZE);
size = ALIGN_DOWN(size, bdev_logical_block_size(bio->bi_bdev));
- if (unlikely(size <= 0))
- return size ? size : -EFAULT;
+ } else
+ nr_pages = 0;
+
+ if (unlikely(size <= 0)) {
+ ret = size ? size : -EFAULT;
+ goto out;
+ }
for (left = size, i = 0; left > 0; left -= len, i++) {
struct page *page = pages[i];
- int ret;
len = min_t(size_t, PAGE_SIZE - offset, left);
- if (bio_op(bio) == REQ_OP_ZONE_APPEND)
+ if (bio_op(bio) == REQ_OP_ZONE_APPEND) {
ret = bio_iov_add_zone_append_page(bio, page, len,
offset);
- else
- ret = bio_iov_add_page(bio, page, len, offset);
+ if (ret)
+ break;
+ } else
+ bio_iov_add_page(bio, page, len, offset);
- if (ret) {
- bio_put_pages(pages + i, left, offset);
- return ret;
- }
offset = 0;
}
- iov_iter_advance(iter, size);
- return 0;
+ iov_iter_advance(iter, size - left);
+out:
+ while (i < nr_pages)
+ put_page(pages[i++]);
+
+ return ret;
}
/**