From 85c938e8914f8f0e276b8e82d4f2e4bcab044e96 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Tue, 4 Apr 2023 11:14:26 -0400 Subject: dm table: allow targets without devices to set ->io_hints In dm_calculate_queue_limits, add call to ->io_hints hook if the target doesn't provide ->iterate_devices. This is needed so the "error" and "zero" targets may support discards. The 2 following commits will add their respective discard support. Signed-off-by: Mikulas Patocka Tested-by: Milan Broz Signed-off-by: Mike Snitzer --- drivers/md/dm-table.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/md') diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 2055a758541d..119db5e01080 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1670,8 +1670,12 @@ int dm_calculate_queue_limits(struct dm_table *t, blk_set_stacking_limits(&ti_limits); - if (!ti->type->iterate_devices) + if (!ti->type->iterate_devices) { + /* Set I/O hints portion of queue limits */ + 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. -- cgit v1.2.3