netdev - [net 1/3] can: softing: softing_netdev

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Message-Id: <20201204133508.742120-2-mkl@pengutronix.de>
Date:   Fri,  4 Dec 2020 14:35:06 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
        kernel@...gutronix.de, Zhang Qilong <zhangqilong3@...wei.com>,
        Kurt Van Dijck <dev.kurt@...dijck-laurijssen.be>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [net 1/3] can: softing: softing_netdev_open(): fix error handling

From: Zhang Qilong <zhangqilong3@...wei.com>

If softing_netdev_open() fails, we should call close_candev() to avoid
reference leak.

Fixes: 03fd3cf5a179d ("can: add driver for Softing card")
Signed-off-by: Zhang Qilong <zhangqilong3@...wei.com>
Acked-by: Kurt Van Dijck <dev.kurt@...dijck-laurijssen.be>
Link: https://lore.kernel.org/r/20201202151632.1343786-1-zhangqilong3@huawei.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/softing/softing_main.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/softing/softing_main.c b/drivers/net/can/softing/softing_main.c
index 9d2faaa39ce4..c9ca8b9fceb9 100644
--- a/drivers/net/can/softing/softing_main.c
+++ b/drivers/net/can/softing/softing_main.c
@@ -382,8 +382,13 @@ static int softing_netdev_open(struct net_device *ndev)
 
 	/* check or determine and set bittime */
 	ret = open_candev(ndev);
-	if (!ret)
-		ret = softing_startstop(ndev, 1);
+	if (ret)
+		return ret;
+
+	ret = softing_startstop(ndev, 1);
+	if (ret < 0)
+		close_candev(ndev);
+
 	return ret;
 }
 

base-commit: bbe2ba04c5a92a49db8a42c850a5a2f6481e47eb
-- 
2.29.2