linux-kernel - [PATCH net] net: defxx: Fix missing err handling in dfx

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Date:   Wed, 7 Dec 2022 07:20:45 +0000
From:   Yongqiang Liu <liuyongqiang13@...wei.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <macro@...am.me.uk>, <davem@...emloft.net>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>, <ralf@...ux-mips.org>,
        <jeff@...zik.org>, <akpm@...ux-foundation.org>,
        <liuyongqiang13@...wei.com>, <zhangxiaoxu5@...wei.com>
Subject: [PATCH net] net: defxx: Fix missing err handling in dfx_init()

When eisa_driver_register() or tc_register_driver() failed,
the modprobe defxx would fail with some err log as follows:

 Error: Driver 'defxx' is already registered, aborting...

Fix this issue by adding err hanling in dfx_init().

Fixes: e89a2cfb7d7b5 ("[TC] defxx: TURBOchannel support")
Signed-off-by: Yongqiang Liu <liuyongqiang13@...wei.com>
---
 drivers/net/fddi/defxx.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/net/fddi/defxx.c b/drivers/net/fddi/defxx.c
index b584ffe38ad6..1fef8a9b1a0f 100644
--- a/drivers/net/fddi/defxx.c
+++ b/drivers/net/fddi/defxx.c
@@ -3831,10 +3831,24 @@ static int dfx_init(void)
 	int status;
 
 	status = pci_register_driver(&dfx_pci_driver);
-	if (!status)
-		status = eisa_driver_register(&dfx_eisa_driver);
-	if (!status)
-		status = tc_register_driver(&dfx_tc_driver);
+	if (status)
+		goto err_pci_register;
+
+	status = eisa_driver_register(&dfx_eisa_driver);
+	if (status)
+		goto err_eisa_register;
+
+	status = tc_register_driver(&dfx_tc_driver);
+	if (status)
+		goto err_tc_register;
+
+	return 0;
+
+err_tc_register:
+	eisa_driver_unregister(&dfx_eisa_driver);
+err_eisa_register:
+	pci_unregister_driver(&dfx_pci_driver);
+err_pci_register:
 	return status;
 }
 
-- 
2.25.1