From 989f26f5ad308f40a95f280bf9cd75e558d4f18d Mon Sep 17 00:00:00 2001
From: Joe Thornber <ejt@redhat.com>
Date: Tue, 11 Mar 2014 16:46:25 +0000
Subject: dm era: check for a non-NULL metadata object before closing it
era_ctr() may call era_destroy() before era->md is initialized so
era_destory() must only close the metadata object if it is not NULL.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Naohiro Aota <naota@elisp.net>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 3.15+
---
drivers/md/dm-era-target.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
(limited to 'drivers/md')
diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c
index 414dad4cb49b..ad913cd4aded 100644
--- a/drivers/md/dm-era-target.c
+++ b/drivers/md/dm-era-target.c
@@ -1391,7 +1391,8 @@ static int era_is_congested(struct dm_target_callbacks *cb, int bdi_bits)
static void era_destroy(struct era *era)
{
- metadata_close(era->md);
+ if (era->md)
+ metadata_close(era->md);
if (era->wq)
destroy_workqueue(era->wq);
--
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