diff mbox series

[v2,4.9,2/2] dm table: fix DAX iterate_devices based device capability checks

Message ID 20210309032023.98465-3-jefflexu@linux.alibaba.com
State New
Headers show
Series dm table: fix iterate_devices based device | expand

Commit Message

Jingbo Xu March 9, 2021, 3:20 a.m. UTC 
commit 5b0fab508992c2e120971da658ce80027acbc405 upstream.

Fix dm_table_supports_dax() and invert logic of both
iterate_devices_callout_fn so that all devices' DAX capabilities are
properly checked.

Fixes: 545ed20e6df6 ("dm: add infrastructure for DAX support")
Cc: stable@vger.kernel.org
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
[jeffle: no dax write cache, no dax synchronous]
---
 drivers/md/dm-table.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 1728e3638136..4fc68c00c231 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -848,12 +848,12 @@  void dm_table_set_type(struct dm_table *t, unsigned type)
 }
 EXPORT_SYMBOL_GPL(dm_table_set_type);
 
-static int device_supports_dax(struct dm_target *ti, struct dm_dev *dev,
-			       sector_t start, sector_t len, void *data)
+static int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev,
+				  sector_t start, sector_t len, void *data)
 {
 	struct request_queue *q = bdev_get_queue(dev->bdev);
 
-	return q && blk_queue_dax(q);
+	return q && !blk_queue_dax(q);
 }
 
 static bool dm_table_supports_dax(struct dm_table *t)
@@ -869,7 +869,7 @@  static bool dm_table_supports_dax(struct dm_table *t)
 			return false;
 
 		if (!ti->type->iterate_devices ||
-		    !ti->type->iterate_devices(ti, device_supports_dax, NULL))
+		    ti->type->iterate_devices(ti, device_not_dax_capable, NULL))
 			return false;
 	}