3.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joe Thornber <ejt@xxxxxxxxxx>
commit 989f26f5ad308f40a95f280bf9cd75e558d4f18d upstream.
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@xxxxxxxxxx>
Signed-off-by: Naohiro Aota <naota@xxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-era-target.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- 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_ta
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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