[PATCH 5.10 33/71] gianfar: ethtool: Fix refcount leak in gfar_get_ts_info

Greg Kroah-Hartman
2022-03-14T12:03:08Z

From: Miaoqian Lin <linmq006@gmail.com>

[ Upstream commit 2ac5b58e645c66932438bb021cb5b52097ce70b0 ]

The of_find_compatible_node() function returns a node pointer with
refcount incremented, We should use of_node_put() on it when done
Add the missing of_node_put() to release the refcount.

Fixes: 7349a74ea75c ("net: ethernet: gianfar_ethtool: get phc index through drvdata")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Link: https://lore.kernel.org/r/20220310015313.14938-1-linmq006@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/freescale/gianfar_ethtool.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c b/drivers/net/ethernet/freescale/gianfar_ethtool.c
index cc7d4f93da54..799a1486f586 100644
--- a/drivers/net/ethernet/freescale/gianfar_ethtool.c
+++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c
@@ -1456,6 +1456,7 @@ static int gfar_get_ts_info(struct net_device *dev,
ptp_node = of_find_compatible_node(NULL, NULL, "fsl,etsec-ptp");
if (ptp_node) {
ptp_dev = of_find_device_by_node(ptp_node);
+ of_node_put(ptp_node);
if (ptp_dev)
ptp = platform_get_drvdata(ptp_dev);
}
--
2.34.1