From: Christoph Hellwig <hch@lst.de>
Date: Tue, 25 Feb 2025 15:44:31 +0000 (-0800)
Subject: block: mark bounce buffering as incompatible with integrity
X-Git-Tag: v6.14.9~472
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=457eb1529e50cd5c7fcb7fbb953c4a46cba6f099;p=thirdparty%2Fkernel%2Fstable.git

block: mark bounce buffering as incompatible with integrity

[ Upstream commit 5fd0268a8806d35dcaf89139bfcda92be51b2b2f ]

None of the few drivers still using the legacy block layer bounce
buffering support integrity metadata.  Explicitly mark the features as
incompatible and stop creating the slab and mempool for integrity
buffers for the bounce bio_set.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20250225154449.422989-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 67b119ffa1689..c430c10c864b6 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -124,6 +124,11 @@ static int blk_validate_integrity_limits(struct queue_limits *lim)
 		return 0;
 	}
 
+	if (lim->features & BLK_FEAT_BOUNCE_HIGH) {
+		pr_warn("no bounce buffer support for integrity metadata\n");
+		return -EINVAL;
+	}
+
 	if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) {
 		pr_warn("integrity support disabled.\n");
 		return -EINVAL;
diff --git a/block/bounce.c b/block/bounce.c
index 0d898cd5ec497..09a9616cf2094 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -41,8 +41,6 @@ static void init_bounce_bioset(void)
 
 	ret = bioset_init(&bounce_bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS);
 	BUG_ON(ret);
-	if (bioset_integrity_create(&bounce_bio_set, BIO_POOL_SIZE))
-		BUG_ON(1);
 
 	ret = bioset_init(&bounce_bio_split, BIO_POOL_SIZE, 0, 0);
 	BUG_ON(ret);