Ensure that only power of 2 zoned devices are enabled for dm targets that
supports zoned devices. This constraint can be relaxed once non power of
2 zone size support is added to the DM layer.
Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
---
drivers/md/dm-table.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 03541cfc2317..2a8af70d1d4a 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -251,6 +251,12 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
if (bdev_is_zoned(bdev)) {
unsigned int zone_sectors = bdev_zone_sectors(bdev);
+ if (!is_power_of_2(zone_sectors)) {
+ DMWARN("%s: %pg only power of two zone size supported",
+ dm_device_name(ti->table->md), bdev);
+ return 1;
+ }
+
if (start & (zone_sectors - 1)) {
DMWARN("%s: start=%llu not aligned to h/w zone size %u of %pg",
dm_device_name(ti->table->md),
--
2.25.1
--
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