linux-kernel - [PATCH 2/8] [LIO-Target]: Properly release se_cmd_t w/ CHECK_CONDITION exception during iSCSI session recovery

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Message-Id: <1229814375.4560.210.camel@haakon2.linux-iscsi.org>
Date:	Sat, 20 Dec 2008 15:06:15 -0800
From:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To:	"Linux-iSCSI.org Target Dev" 
	<linux-iscsi-target-dev@...glegroups.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>
Subject: [PATCH 2/8] [LIO-Target]: Properly release se_cmd_t w/
	CHECK_CONDITION exception during iSCSI session recovery

>>From c7e5c1224267c6eac41863b78d0a907dc55944be Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@...ux-iscsi.org>
Date: Sat, 20 Dec 2008 02:05:54 -0800
Subject: [PATCH 2/8] [LIO-Target]: Properly release se_cmd_t w/ CHECK_CONDITION exception during iSCSI session recovery

This patch fixes v3.0 breakage that was leaking a se_cmd_t w/ CHECK_CONDITION
after hitting a NON_EXISTENT se_lun_t exception.  This patch adds the special
case in iscsi_release_commands_from_conn() and calls transport_release_cmd_to_pool()
on the se_cmd_t in question.

Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
 drivers/lio-core/iscsi_target.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/lio-core/iscsi_target.c b/drivers/lio-core/iscsi_target.c
index d234fe0..d705871 100644
--- a/drivers/lio-core/iscsi_target.c
+++ b/drivers/lio-core/iscsi_target.c
@@ -4744,7 +4744,14 @@ static void iscsi_release_commands_from_conn (iscsi_conn_t *conn)
 			spin_unlock_bh(&conn->cmd_lock);
 
 			iscsi_increment_maxcmdsn(cmd, sess);
-			__iscsi_release_cmd_to_pool(cmd, sess);
+			/*
+			 * Special case for transport_get_lun_for_cmd() failing
+			 * from iscsi_get_lun_for_cmd() in iscsi_handle_scsi_cmd().
+			 */
+			if (SE_CMD(cmd))
+				transport_release_cmd_to_pool(SE_CMD(cmd));	
+			else
+				__iscsi_release_cmd_to_pool(cmd, sess);
 
 			spin_lock_bh(&conn->cmd_lock);
 			cmd = cmd_next;
-- 
1.5.4.1



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