linux-kernel - [PATCH] aic94xx: set error code on an error path in aic94xx

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Date:   Thu, 31 May 2018 21:28:14 +0300
From:   Peter Melnichenko <melnichenko@...ras.ru>
To:     "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>
Cc:     Peter Melnichenko <melnichenko@...ras.ru>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        ldv-project@...uxtesting.org
Subject: [PATCH] aic94xx: set error code on an error path in aic94xx_init

When sas_domain_attach_transport returns NULL, aic94xx_init
frees acquired resources but returns err equal to 0, as
assigned by a previous statement.

The patch sets err to -ENOMEM before jumping to the error label.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Peter Melnichenko <melnichenko@...ras.ru>
---
 drivers/scsi/aic94xx/aic94xx_init.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c
index 6c83886..4a4746c 100644
--- a/drivers/scsi/aic94xx/aic94xx_init.c
+++ b/drivers/scsi/aic94xx/aic94xx_init.c
@@ -1030,8 +1030,10 @@ static int __init aic94xx_init(void)
 
 	aic94xx_transport_template =
 		sas_domain_attach_transport(&aic94xx_transport_functions);
-	if (!aic94xx_transport_template)
+	if (!aic94xx_transport_template) {
+		err = -ENOMEM;
 		goto out_destroy_caches;
+	}
 
 	err = pci_register_driver(&aic94xx_pci_driver);
 	if (err)
-- 
2.7.4