bio-integrity-fs: pass data iter to bio_integrity_verify()

bio_integrity_verify() expects the passed struct bvec_iter to be an
iterator over bio data, not integrity. So construct a separate data
bvec_iter without the bio_integrity_bytes() conversion and pass it to
bio_integrity_verify() instead of bip_iter.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Fixes: 0bde8a1 ("block: add fs_bio_integrity helpers")
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Author: calebsander

block/bio-integrity-fs.c

@@ -55,6 +55,7 @@ int fs_bio_integrity_verify(struct bio *bio, sector_t sector, unsigned int size)
 {
 	struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
 	struct bio_integrity_payload *bip = bio_integrity(bio);
+	struct bvec_iter data_iter = {.bi_sector = sector, .bi_size = size};
 
 	/*
 	 * Reinitialize bip->bip_iter.
@@ -65,7 +66,7 @@ int fs_bio_integrity_verify(struct bio *bio, sector_t sector, unsigned int size)
 	memset(&bip->bip_iter, 0, sizeof(bip->bip_iter));
 	bip->bip_iter.bi_sector = sector;
 	bip->bip_iter.bi_size = bio_integrity_bytes(bi, size >> SECTOR_SHIFT);
-	return blk_status_to_errno(bio_integrity_verify(bio, &bip->bip_iter));
+	return blk_status_to_errno(bio_integrity_verify(bio, &data_iter));
 }
 
 static int __init fs_bio_integrity_init(void)