linux-kernel - [PATCH] target, iscsi: Fix up a few assignments

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Message-ID: <alpine.LNX.2.00.1201151929400.13069@swampdragon.chaosbits.net>
Date:	Sun, 15 Jan 2012 19:33:30 +0100 (CET)
From:	Jesper Juhl <jj@...osbits.net>
To:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
cc:	target-devel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Andy Grover <agrover@...hat.com>,
	Dan Carpenter <error27@...il.com>,
	Roland Dreier <roland@...nel.org>,
	Christoph Hellwig <hch@....de>
Subject: [PATCH] target, iscsi: Fix up a few assignments

A statement such as
  struct iscsi_node_attrib *na = na = iscsit_tpg_get_node_attrib(sess);
has undefined behaviour since there are two assignments to 'na', strictly 
speaking (the order in which side-effects from the assignments take place 
is undefined since there's no intervening sequence point), and it looks 
unintentional in any case.

Signed-off-by: Jesper Juhl <jj@...osbits.net>
---
 drivers/target/iscsi/iscsi_target_erl1.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

 compile tested only.

diff --git a/drivers/target/iscsi/iscsi_target_erl1.c b/drivers/target/iscsi/iscsi_target_erl1.c
index 101b1be..af18cb8 100644
--- a/drivers/target/iscsi/iscsi_target_erl1.c
+++ b/drivers/target/iscsi/iscsi_target_erl1.c
@@ -1238,7 +1238,7 @@ void iscsit_mod_dataout_timer(struct iscsi_cmd *cmd)
 {
 	struct iscsi_conn *conn = cmd->conn;
 	struct iscsi_session *sess = conn->sess;
-	struct iscsi_node_attrib *na = na = iscsit_tpg_get_node_attrib(sess);
+	struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
 
 	spin_lock_bh(&cmd->dataout_timeout_lock);
 	if (!(cmd->dataout_timer_flags & ISCSI_TF_RUNNING)) {
@@ -1261,7 +1261,7 @@ void iscsit_start_dataout_timer(
 	struct iscsi_conn *conn)
 {
 	struct iscsi_session *sess = conn->sess;
-	struct iscsi_node_attrib *na = na = iscsit_tpg_get_node_attrib(sess);
+	struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
 
 	if (cmd->dataout_timer_flags & ISCSI_TF_RUNNING)
 		return;
-- 
1.7.8.3


-- 
Jesper Juhl <jj@...osbits.net>       http://www.chaosbits.net/
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