From: Christoph Hellwig <hch@lst.de>
Date: Fri, 21 Mar 2025 12:46:36 +0000 (+0100)
Subject: dm-integrity: use bio_add_virt_nofail
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=422ff360b0e122b21d6f99a07edcf116f3866d4f;p=users%2Fhch%2Fmisc.git

dm-integrity: use bio_add_virt_nofail

Convert the __bio_add_page(..., virt_to_page(out), ...) pattern to the
bio_add_virt_nofail helper implementing it, and do the same for the
similar pattern using bio_add_page for adding the first segment after
a bio allocation as that can't fail either.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index e743657379f7..86874746c884 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2558,14 +2558,8 @@ static void dm_integrity_inline_recheck(struct work_struct *w)
 		char *mem;
 
 		outgoing_bio = bio_alloc_bioset(ic->dev->bdev, 1, REQ_OP_READ, GFP_NOIO, &ic->recheck_bios);
-
-		r = bio_add_page(outgoing_bio, virt_to_page(outgoing_data), ic->sectors_per_block << SECTOR_SHIFT, 0);
-		if (unlikely(r != (ic->sectors_per_block << SECTOR_SHIFT))) {
-			bio_put(outgoing_bio);
-			bio->bi_status = BLK_STS_RESOURCE;
-			bio_endio(bio);
-			return;
-		}
+		bio_add_virt_nofail(outgoing_bio, outgoing_data,
+				ic->sectors_per_block << SECTOR_SHIFT);
 
 		bip = bio_integrity_alloc(outgoing_bio, GFP_NOIO, 1);
 		if (IS_ERR(bip)) {
@@ -3212,7 +3206,8 @@ next_chunk:
 
 	bio = bio_alloc_bioset(ic->dev->bdev, 1, REQ_OP_READ, GFP_NOIO, &ic->recalc_bios);
 	bio->bi_iter.bi_sector = ic->start + SB_SECTORS + range.logical_sector;
-	__bio_add_page(bio, virt_to_page(recalc_buffer), range.n_sectors << SECTOR_SHIFT, offset_in_page(recalc_buffer));
+	bio_add_virt_nofail(bio, recalc_buffer,
+			range.n_sectors << SECTOR_SHIFT);
 	r = submit_bio_wait(bio);
 	bio_put(bio);
 	if (unlikely(r)) {
@@ -3229,7 +3224,8 @@ next_chunk:
 
 	bio = bio_alloc_bioset(ic->dev->bdev, 1, REQ_OP_WRITE, GFP_NOIO, &ic->recalc_bios);
 	bio->bi_iter.bi_sector = ic->start + SB_SECTORS + range.logical_sector;
-	__bio_add_page(bio, virt_to_page(recalc_buffer), range.n_sectors << SECTOR_SHIFT, offset_in_page(recalc_buffer));
+	bio_add_virt_nofail(bio, recalc_buffer,
+			range.n_sectors << SECTOR_SHIFT);
 
 	bip = bio_integrity_alloc(bio, GFP_NOIO, 1);
 	if (unlikely(IS_ERR(bip))) {