diff mbox series

[16/19] md: raid1: use __bio_add_page for adding single page to bio

Message ID 8758569c543389604d8a6a9460de086246fabe89.1680108414.git.johannes.thumshirn@wdc.com (mailing list archive)
State New
Headers show
Series bio: check return values of bio_add_page | expand

Commit Message

Johannes Thumshirn March 29, 2023, 5:06 p.m. UTC 
The sync request code uses bio_add_page() to add a page to a newly created bio.
bio_add_page() can fail, but the return value is never checked.

Use __bio_add_page() as adding a single page to a newly created bio is
guaranteed to succeed.

This brings us a step closer to marking bio_add_page() as __must_check.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 drivers/md/raid1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Damien Le Moal March 29, 2023, 11:38 p.m. UTC | #1 
On 3/30/23 02:06, Johannes Thumshirn wrote:
> The sync request code uses bio_add_page() to add a page to a newly created bio.
> bio_add_page() can fail, but the return value is never checked.
> 
> Use __bio_add_page() as adding a single page to a newly created bio is
> guaranteed to succeed.
> 
> This brings us a step closer to marking bio_add_page() as __must_check.
> 
> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
diff mbox series

Patch

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index bd7c339a84a1..c226d293992f 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2915,7 +2915,7 @@  static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 				 * won't fail because the vec table is big
 				 * enough to hold all these pages
 				 */
-				bio_add_page(bio, page, len, 0);
+				__bio_add_page(bio, page, len, 0);
 			}
 		}
 		nr_sectors += len>>9;