linux-kernel - [PATCH] [media] ddbridge: fix error handling in module_init

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Date:	Thu, 16 Aug 2012 00:42:25 +0400
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	Alexey Khoroshilov <khoroshilov@...ras.ru>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	ldv-project@...ras.ru
Subject: [PATCH] [media] ddbridge: fix error handling in module_init_ddbridge()

If pci_register_driver() failed, resources allocated in
ddb_class_create() are leaked. The patch fixes it.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/media/dvb/ddbridge/ddbridge-core.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/media/dvb/ddbridge/ddbridge-core.c b/drivers/media/dvb/ddbridge/ddbridge-core.c
index ebf3f05..36aa4e4 100644
--- a/drivers/media/dvb/ddbridge/ddbridge-core.c
+++ b/drivers/media/dvb/ddbridge/ddbridge-core.c
@@ -1705,7 +1705,11 @@ static __init int module_init_ddbridge(void)
 	       "Copyright (C) 2010-11 Digital Devices GmbH\n");
 	if (ddb_class_create())
 		return -1;
-	return pci_register_driver(&ddb_pci_driver);
+	if (pci_register_driver(&ddb_pci_driver) < 0) {
+		ddb_class_destroy();
+		return -1;
+	}
+	return 0;
 }
 
 static __exit void module_exit_ddbridge(void)
-- 
1.7.9.5

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