From dfa584f6f91586dbf7bb9f35f8bbdc06590cde1f Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Thu, 26 Aug 2021 15:55:04 +0200
Subject: [PATCH] dm: use fs_dax_get_by_bdev instead of dax_get_by_host
Git-commit: dfa584f6f91586dbf7bb9f35f8bbdc06590cde1f
Patch-mainline: v5.15-rc1
References: jsc#PED-2765

There is no point in trying to finding the dax device if the DAX flag is
not set on the queue as none of the users of the device mapper exported
block devices could make use of the DAX capability.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20210826135510.6293-4-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Coly Li <colyli@suse.de>

---
 drivers/md/dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 2c5f9e585211..465714341300 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -650,7 +650,7 @@ static int open_table_device(struct table_device *td, dev_t dev,
 	}
 
 	td->dm_dev.bdev = bdev;
-	td->dm_dev.dax_dev = dax_get_by_host(bdev->bd_disk->disk_name);
+	td->dm_dev.dax_dev = fs_dax_get_by_bdev(bdev);
 	return 0;
 }
 
-- 
2.35.3