linux-kernel - [PATCH v2 3/4] bio-integrity: cleanup adding integrity pages to bip's bvec

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Date:   Mon, 31 Jul 2023 21:54:59 +0900
From:   Jinyoung Choi <j-young.choi@...sung.com>
To:     "axboe@...nel.dk" <axboe@...nel.dk>,
        "kbusch@...nel.org" <kbusch@...nel.org>,
        "chaitanya.kulkarni@....com" <chaitanya.kulkarni@....com>,
        "sagi@...mberg.me" <sagi@...mberg.me>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>
Subject: [PATCH v2 3/4] bio-integrity: cleanup adding integrity pages to
 bip's bvec

The bio_integrity_add_page() returns the set length if the execution
result is successful. Otherwise, return 0.

Unnecessary if statement was removed. And when the result value was less
than the set value, it was changed to failed.

Cc: Christoph Hellwig <hch@....de>
Cc: Martin K. Petersen <martin.petersen@...cle.com>

Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Jinyoung Choi <j-young.choi@...sung.com>
---
 block/bio-integrity.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 6220a99977a4..c6b3bc86e1f9 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -252,27 +252,18 @@ bool bio_integrity_prep(struct bio *bio)
 
 	/* Map it */
 	offset = offset_in_page(buf);
-	for (i = 0 ; i < nr_pages ; i++) {
-		int ret;
+	for (i = 0; i < nr_pages && len > 0; i++) {
 		bytes = PAGE_SIZE - offset;
 
-		if (len <= 0)
-			break;
-
 		if (bytes > len)
 			bytes = len;
 
-		ret = bio_integrity_add_page(bio, virt_to_page(buf),
-					     bytes, offset);
-
-		if (ret == 0) {
+		if (bio_integrity_add_page(bio, virt_to_page(buf),
+					   bytes, offset) < bytes) {
 			printk(KERN_ERR "could not attach integrity payload\n");
 			goto err_end_io;
 		}
 
-		if (ret < bytes)
-			break;
-
 		buf += bytes;
 		len -= bytes;
 		offset = 0;
@@ -291,7 +282,6 @@ bool bio_integrity_prep(struct bio *bio)
 	bio->bi_status = BLK_STS_RESOURCE;
 	bio_endio(bio);
 	return false;
-
 }
 EXPORT_SYMBOL(bio_integrity_prep);
 
-- 
2.34.1