linux-kernel - [PATCH AUTOSEL 5.15 25/31] dm-log-writes: set dma_alignment limit in io

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Date:   Wed, 23 Nov 2022 07:42:26 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Keith Busch <kbusch@...nel.org>, Mike Snitzer <snitzer@...nel.org>,
        Jens Axboe <axboe@...nel.dk>, Sasha Levin <sashal@...nel.org>,
        agk@...hat.com, dm-devel@...hat.com
Subject: [PATCH AUTOSEL 5.15 25/31] dm-log-writes: set dma_alignment limit in io_hints

From: Keith Busch <kbusch@...nel.org>

[ Upstream commit 50a893359cd2643ee1afc96eedc9e7084cab49fa ]

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

Signed-off-by: Keith Busch <kbusch@...nel.org>
Reviewed-by: Mike Snitzer <snitzer@...nel.org>
Link: https://lore.kernel.org/r/20221110184501.2451620-6-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/md/dm-log-writes.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index d93a4db23512..4f8f73b89512 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -901,6 +901,7 @@ static void log_writes_io_hints(struct dm_target *ti, struct queue_limits *limit
 	limits->logical_block_size = bdev_logical_block_size(lc->dev->bdev);
 	limits->physical_block_size = bdev_physical_block_size(lc->dev->bdev);
 	limits->io_min = limits->physical_block_size;
+	limits->dma_alignment = limits->logical_block_size - 1;
 }
 
 #if IS_ENABLED(CONFIG_DAX_DRIVER)
-- 
2.35.1