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+
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@ -1391,6 +1391,7 @@ static int era_is_congested(struct dm_target_callbacks *cb, int bdi_bits)
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static void era_destroy(struct era *era)
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static void era_destroy(struct era *era)
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{
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{
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if (era->md)
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metadata_close(era->md);
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metadata_close(era->md);
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if (era->wq)
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if (era->wq)
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