From 38e1b257fd7b4f3eee667d29a5e44ec15e253c1c Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@redhat.com>
Date: Thu, 12 Aug 2010 04:14:14 +0100
Subject: [PATCH] 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>
---
drivers/md/dm-target.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/md/dm-target.c b/drivers/md/dm-target.c
index 11dea11dc0b6..8da366cf381c 100644
--- 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;
}
--
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