[dm-devel] [PATCH v2 08/12] dm error: return error for discards too

[Mike Snitzer]

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 at redhat.com>
---
 drivers/md/dm-target.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/md/dm-target.c b/drivers/md/dm-target.c
index 11dea11..98c31b0 100644
--- a/drivers/md/dm-target.c
+++ b/drivers/md/dm-target.c
@@ -113,6 +113,9 @@ 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 (rather than -EOPNOTSUPP) */
+	tt->num_discard_requests = 1;
+
 	return 0;
 }
 
-- 
1.6.6.1