In era_ctr(), era->md remain NULL until it's set after metadata_open(). On the other hand, era_destroy() assume era->md is non-NULL and it is called by era_ctr() before initializing the value.
This patch just checks if era->md is non-NULL. Signed-off-by: Naohiro Aota <na...@elisp.net> --- 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 414dad4..ad913cd 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); -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/