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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Zhang Qilong <zhangqilong3@huawei.com>,
        Marc Kleine-Budde <mkl@pengutronix.de>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.9 028/105] can: kvaser_pciefd: kvaser_pciefd_open(): fix error handling
Date:   Mon, 14 Dec 2020 18:28:02 +0100
Message-Id: <20201214172556.633733426@linuxfoundation.org>
In-Reply-To: <20201214172555.280929671@linuxfoundation.org>
References: <20201214172555.280929671@linuxfoundation.org>
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From: Zhang Qilong <zhangqilong3@huawei.com>

[ Upstream commit 13a84cf37a4cf1155a41684236c2314eb40cd65c ]

If kvaser_pciefd_bus_on() failed, we should call close_candev() to avoid
reference leak.

Fixes: 26ad340e582d3 ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201128133922.3276973-3-zhangqilong3@huawei.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/can/kvaser_pciefd.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index 72acd1ba162d2..43151dd6cb1c3 100644
--- a/drivers/net/can/kvaser_pciefd.c
+++ b/drivers/net/can/kvaser_pciefd.c
@@ -692,8 +692,10 @@ static int kvaser_pciefd_open(struct net_device *netdev)
 		return err;
 
 	err = kvaser_pciefd_bus_on(can);
-	if (err)
+	if (err) {
+		close_candev(netdev);
 		return err;
+	}
 
 	return 0;
 }
-- 
2.27.0