Commit 5d47c89f authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm: clear all discard attributes in queue_limits when discards are disabled 



Otherwise, it can happen that the QUEUE_FLAG_DISCARD isn't set but the
various discard attributes (which get exposed via sysfs) may be set.

Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 7dea378b

drivers/md/dm-table.c

+8 −2
Original line number Diff line number Diff line
@@ -1801,9 +1801,15 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, 
	 */

	q->limits = *limits;



	if (!dm_table_supports_discards(t))

	if (!dm_table_supports_discards(t)) {

		queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q);

	else

		/* Must also clear discard limits... */

		q->limits.max_discard_sectors = 0;

		q->limits.max_hw_discard_sectors = 0;

		q->limits.discard_granularity = 0;

		q->limits.discard_alignment = 0;

		q->limits.discard_misaligned = 0;

	} else

		queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);



	if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_WC))) {

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