[PATCHv2 2/5] dm-crypt: provide dma_alignment limit in io_hints

From: Keith Busch <kbusch@meta.com>
To: <linux-block@vger.kernel.org>, <dm-devel@redhat.com>, <axboe@kernel.dk>
Cc: <stefanha@redhat.com>, <ebiggers@kernel.org>, <me@demsh.org>,
	<mpatocka@redhat.com>, Keith Busch <kbusch@kernel.org>
Subject: [PATCHv2 2/5] dm-crypt: provide dma_alignment limit in io_hints
Date: Thu, 10 Nov 2022 10:44:58 -0800	[thread overview]
Message-ID: <20221110184501.2451620-3-kbusch@meta.com> (raw)
In-Reply-To: <20221110184501.2451620-1-kbusch@meta.com>

From: Keith Busch <kbusch@kernel.org>

This device mapper needs bio vectors to be sized and memory aligned to
the logical block size. Set the minimum required queue limit
accordingly.

Link: https://lore.kernel.org/linux-block/20221101001558.648ee024@xps.demsh.org/
Fixes: b1a000d3b8ec5 ("block: relax direct io memory alignment")
Reportred-by: Eric Biggers <ebiggers@kernel.org>
Reported-by: Dmitrii Tcvetkov <me@demsh.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 drivers/md/dm-crypt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 159c6806c19b..2653516bcdef 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -3630,6 +3630,7 @@ static void crypt_io_hints(struct dm_target *ti, struct queue_limits *limits)
 	limits->physical_block_size =
 		max_t(unsigned, limits->physical_block_size, cc->sector_size);
 	limits->io_min = max_t(unsigned, limits->io_min, cc->sector_size);
+	limits->dma_alignment = limits->logical_block_size - 1;
 }
 
 static struct target_type crypt_target = {
-- 
2.30.2

