can: kvaser_pciefd: kvaser_pciefd_open(): fix error handling

[ 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>

diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index 72acd1ba162d2671e99d30167d45bb7cb771b371..43151dd6cb1c39c9e7d83b04c72ed4f1def945a0 100644 (file)
--- 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;
 }