From: Johan Hovold Date: Fri, 25 Jul 2025 17:12:11 +0000 (+0200) Subject: net: gianfar: fix device leak when querying time stamp info X-Git-Tag: io_uring-6.17-20250815~26^2~37^2~2 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=da717540acd34e5056e3fa35791d50f6b3303f55;p=linux-block.git net: gianfar: fix device leak when querying time stamp info Make sure to drop the reference to the ptp device taken by of_find_device_by_node() when querying the time stamping capabilities. Note that holding a reference to the ptp device does not prevent its driver data from going away. Fixes: 7349a74ea75c ("net: ethernet: gianfar_ethtool: get phc index through drvdata") Cc: stable@vger.kernel.org # 4.18 Cc: Yangbo Lu Signed-off-by: Johan Hovold Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250725171213.880-4-johan@kernel.org Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c b/drivers/net/ethernet/freescale/gianfar_ethtool.c index 28f53cf2a174..5fd1f7327680 100644 --- a/drivers/net/ethernet/freescale/gianfar_ethtool.c +++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c @@ -1475,8 +1475,10 @@ static int gfar_get_ts_info(struct net_device *dev, if (ptp_node) { ptp_dev = of_find_device_by_node(ptp_node); of_node_put(ptp_node); - if (ptp_dev) + if (ptp_dev) { ptp = platform_get_drvdata(ptp_dev); + put_device(&ptp_dev->dev); + } } if (ptp)