Commit 85c938e8 authored Apr 04, 2023 by Mikulas Patocka Committed by Mike Snitzer Apr 04, 2023

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 <mpatocka@redhat.com>
Tested-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>

parent 074c4466

drivers/md/dm-table.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -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.