From e24da0913cee80b14ca54cda56d4c78b4242c424 Mon Sep 17 00:00:00 2001
From: Jie Wang <wangjie88@huawei.com>
Date: Sat, 5 Jan 2019 16:11:12 +0800
Subject: [PATCH] lvol: fix Null-checking after dereferenced
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fix Null-checking after dereferenced

Change-Id: I5c9dad9c894e8d7cc9e9847c7c03d204fdbacfcb
Signed-off-by: Jie Wang <wangjie88@huawei.com>
Reviewed-on: https://review.gerrithub.io/c/439094
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Piotr Pelpliński <piotr.pelplinski@intel.com>
Reviewed-by: Maciej Szwed <maciej.szwed@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
---
 lib/lvol/lvol.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/lvol/lvol.c b/lib/lvol/lvol.c
index 138f14d4c..95bc37ca8 100644
--- a/lib/lvol/lvol.c
+++ b/lib/lvol/lvol.c
@@ -1357,7 +1357,7 @@ void
 spdk_lvol_destroy(struct spdk_lvol *lvol, spdk_lvol_op_complete cb_fn, void *cb_arg)
 {
 	struct spdk_lvol_req *req;
-	struct spdk_blob_store *bs = lvol->lvol_store->blobstore;
+	struct spdk_blob_store *bs;
 
 	assert(cb_fn != NULL);
 
@@ -1385,6 +1385,7 @@ spdk_lvol_destroy(struct spdk_lvol *lvol, spdk_lvol_op_complete cb_fn, void *cb_
 	req->cb_fn = cb_fn;
 	req->cb_arg = cb_arg;
 	req->lvol = lvol;
+	bs = lvol->lvol_store->blobstore;
 
 	spdk_bs_delete_blob(bs, lvol->blob_id, _spdk_lvol_delete_blob_cb, req);
 }