[Devel] [PATCH RH8 01/61] dm: Call io_hints even for device-less drivers

[Kirill Tkhai]

Ploop wants to set proper discard_granularity
despite it is not mapped on real device.

Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
---
 drivers/md/dm-table.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 3545281e5716..e43e975ea9b4 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1498,8 +1498,11 @@ int dm_calculate_queue_limits(struct dm_table *table,
 
 		ti = dm_table_get_target(table, i);
 
-		if (!ti->type->iterate_devices)
+		if (!ti->type->iterate_devices) {
+			if (ti->type->io_hints)
+				ti->type->io_hints(ti, &ti_limits);
 			goto combine_limits;
+		}
 
 		/*
 		 * Combine queue limits of all the devices this target uses.