From 9380e29a274fcdbc2bd14fea36bdac35d52c36db Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Sun, 10 Mar 2019 04:43:31 +0000
Subject: [PATCH] scst, tgt_dev: Hold a reference on struct scst_device

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8034 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scst/src/scst_lib.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scst/src/scst_lib.c b/scst/src/scst_lib.c
index 448245423..612946eb6 100644
--- a/scst/src/scst_lib.c
+++ b/scst/src/scst_lib.c
@@ -5470,6 +5470,8 @@ static int scst_alloc_add_tgt_dev(struct scst_session *sess,
 
 	*out_tgt_dev = tgt_dev;
 
+	percpu_ref_get(&dev->refcnt);
+
 out:
 	TRACE_EXIT_RES(res);
 	return res;
@@ -5572,6 +5574,8 @@ static void scst_free_tgt_dev(struct scst_tgt_dev *tgt_dev)
 
 	kmem_cache_free(scst_tgtd_cachep, tgt_dev);
 
+	percpu_ref_put(&dev->refcnt);
+
 	TRACE_EXIT();
 	return;
 }