block: refactor to use helper

[ Upstream commit 8f63fef586 ]

Reduce some code by making use of bio_integrity_bytes().

Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20230719121608.32105-1-nj.shetty@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 899ee2c382 ("block: initialize integrity buffer to zero before writing it to media")
Signed-off-by: Sasha Levin <sashal@kernel.org>

block/bio-integrity.c

@@ -203,7 +203,6 @@ bool bio_integrity_prep(struct bio *bio)
 	unsigned long start, end;
 	unsigned int len, nr_pages;
 	unsigned int bytes, offset, i;
-	unsigned int intervals;
 	blk_status_t status;
 
 	if (!bi)
@@ -228,10 +227,9 @@ bool bio_integrity_prep(struct bio *bio)
 		    !(bi->flags & BLK_INTEGRITY_GENERATE))
 			return true;
 	}
-	intervals = bio_integrity_intervals(bi, bio_sectors(bio));
 
 	/* Allocate kernel buffer for protection data */
-	len = intervals * bi->tuple_size;
+	len = bio_integrity_bytes(bi, bio_sectors(bio));
 	buf = kmalloc(len, GFP_NOIO);
 	status = BLK_STS_RESOURCE;
 	if (unlikely(buf == NULL)) {