linux-kernel - [PATCH 4.9 127/177] target:fix condition return in core_pr_dump_initiator

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Message-Id: <20171218152916.579593683@linuxfoundation.org>
Date:   Mon, 18 Dec 2017 16:49:10 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, tangwenji <tang.wenji@....com.cn>,
        Nicholas Bellinger <nab@...ux-iscsi.org>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 127/177] target:fix condition return in core_pr_dump_initiator_port()

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

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

From: tangwenji <tang.wenji@....com.cn>


[ Upstream commit 24528f089d0a444070aa4f715ace537e8d6bf168 ]

When is pr_reg->isid_present_at_reg is false,this function should return.

This fixes a regression originally introduced by:

  commit d2843c173ee53cf4c12e7dfedc069a5bc76f0ac5
  Author: Andy Grover <agrover@...hat.com>
  Date:   Thu May 16 10:40:55 2013 -0700

      target: Alter core_pr_dump_initiator_port for ease of use

Signed-off-by: tangwenji <tang.wenji@....com.cn>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/target/target_core_pr.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -56,8 +56,10 @@ void core_pr_dump_initiator_port(
 	char *buf,
 	u32 size)
 {
-	if (!pr_reg->isid_present_at_reg)
+	if (!pr_reg->isid_present_at_reg) {
 		buf[0] = '\0';
+		return;
+	}
 
 	snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid);
 }