linux-kernel - [PATCH 3.19 26/75] tcm_qla2xxx: Fix incorrect use of __transport_register

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Message-Id: <20150410131709.213315883@linuxfoundation.org>
Date:	Fri, 10 Apr 2015 15:18:52 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Bart Van Assche <bart.vanassche@...disk.com>,
	Giridhar Malavali <giridhar.malavali@...gic.com>,
	Quinn Tran <quinn.tran@...gic.com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 3.19 26/75] tcm_qla2xxx: Fix incorrect use of __transport_register_session

3.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bart Van Assche <bart.vanassche@...disk.com>

commit 75c3d0bf9caebb502e96683b2bc37f9692437e68 upstream.

This patch fixes the incorrect use of __transport_register_session()
in tcm_qla2xxx_check_initiator_node_acl() code, that does not perform
explicit se_tpg->session_lock when accessing se_tpg->tpg_sess_list
to add new se_sess nodes.

Given that tcm_qla2xxx_check_initiator_node_acl() is not called with
qla_hw->hardware_lock held for all accesses of ->tpg_sess_list, the
code should be using transport_register_session() instead.

Signed-off-by: Bart Van Assche <bart.vanassche@...disk.com>
Cc: Giridhar Malavali <giridhar.malavali@...gic.com>
Cc: Quinn Tran <quinn.tran@...gic.com>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/qla2xxx/tcm_qla2xxx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -1598,7 +1598,7 @@ static int tcm_qla2xxx_check_initiator_n
 	/*
 	 * Finally register the new FC Nexus with TCM
 	 */
-	__transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
+	transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
 
 	return 0;
 }


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