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

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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: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2017-11-16 15:42:26 -05:00
parent 7dea378b23
commit 5d47c89f29
1 changed files with 8 additions and 2 deletions
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10
drivers/md/dm-table.c
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@ -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))) {