linux-kernel - [PATCH] scsi: libiscsi: Fix an error handling path in 'iscsi_session

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Message-Id: <20170914054740.23129-1-christophe.jaillet@wanadoo.fr>
Date:   Thu, 14 Sep 2017 07:47:40 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     lduncan@...e.com, cleech@...hat.com, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com
Cc:     open-iscsi@...glegroups.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] scsi: libiscsi: Fix an error handling path in 'iscsi_session_setup()'

All error handling paths in this function go through
'iscsi_host_dec_session_cnt()' except this one.
Fix it and properly decrement the number of active sessions in such a case.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/scsi/libiscsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index bd4605a34f54..5d195375ba75 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -2779,7 +2779,7 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
 		       "must be a power of 2.\n", total_cmds);
 		total_cmds = rounddown_pow_of_two(total_cmds);
 		if (total_cmds < ISCSI_TOTAL_CMDS_MIN)
-			return NULL;
+			goto dec_session_count;
 		printk(KERN_INFO "iscsi: Rounding can_queue to %d.\n",
 		       total_cmds);
 	}
-- 
2.11.0