From 989f26f5ad308f40a95f280bf9cd75e558d4f18d Mon Sep 17 00:00:00 2001 From: Joe Thornber Date: Tue, 11 Mar 2014 16:46:25 +0000 Subject: [PATCH] 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 Signed-off-by: Naohiro Aota Signed-off-by: Mike Snitzer Cc: stable@vger.kernel.org # 3.15+ --- drivers/md/dm-era-target.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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);