dm: error return error for discards

Have the error target respond to a discard request with a hard -EIO rather than fail the request with -EOPNOTSUPP. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
git-mirror · Aug 12, 2010 · 38e1b25 · 38e1b25
1 parent 3fd5d48
commit 38e1b25
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/md/dm-target.c b/drivers/md/dm-target.c
@@ -113,6 +113,11 @@ void dm_unregister_target(struct target_type *tt)
  */
 static int io_err_ctr(struct dm_target *tt, unsigned int argc, char **args)
 {
+	/*
+	 * Return error for discards instead of -EOPNOTSUPP
+	 */
+	tt->num_discard_requests = 1;
+
 	return 0;
 }