[dm-devel] [PATCH 2/4] Clear the discard flag if the device loses discard capability

[Mikulas Patocka <mpatocka redhat com>]

Clear the discard flag if the device loses discard capability
because of table reload.

Signed-off-by: Mikulas Patocka <mpatocka redhat com>

---
 drivers/md/dm-table.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6.35-rc3-fast/drivers/md/dm-table.c
===================================================================
--- linux-2.6.35-rc3-fast.orig/drivers/md/dm-table.c	2010-07-02 16:04:36.000000000 +0200
+++ linux-2.6.35-rc3-fast/drivers/md/dm-table.c	2010-07-02 16:07:49.000000000 +0200
@@ -1098,7 +1098,9 @@ void dm_table_set_restrictions(struct dm
 	else
 		queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, q);
 
-	if (dm_table_supports_discards(t))
+	if (!dm_table_supports_discards(t))
+		queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q);
+	else
 		queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
 
 	dm_table_set_integrity(t);