From edaf5df22cb8e7e849773ce69fcc9bc20ca92160 Mon Sep 17 00:00:00 2001 From: Vincent Mailhol Date: Tue, 8 Nov 2022 12:57:54 +0900 Subject: ethtool: ethtool_get_drvinfo: populate drvinfo fields even if callback exits If ethtool_ops::get_drvinfo() callback isn't set, ethtool_get_drvinfo() will fill the ethtool_drvinfo::name and ethtool_drvinfo::bus_info fields. However, if the driver provides the callback function, those two fields are not touched. This means that the driver has to fill these itself. Allow the driver to leave those two fields empty and populate them in such case. This way, the driver can rely on the default values for the name and the bus_info. If the driver provides values, do nothing. Signed-off-by: Vincent Mailhol Link: https://lore.kernel.org/r/20221108035754.2143-1-mailhol.vincent@wanadoo.fr Signed-off-by: Jakub Kicinski --- net/ethtool/ioctl.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'net/ethtool/ioctl.c') diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index e40f5e9e109b..99272a67525c 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -706,15 +706,22 @@ static int ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp) { const struct ethtool_ops *ops = dev->ethtool_ops; + struct device *parent = dev->dev.parent; rsp->info.cmd = ETHTOOL_GDRVINFO; strscpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version)); if (ops->get_drvinfo) { ops->get_drvinfo(dev, &rsp->info); - } else if (dev->dev.parent && dev->dev.parent->driver) { - strscpy(rsp->info.bus_info, dev_name(dev->dev.parent), + if (!rsp->info.bus_info[0] && parent) + strscpy(rsp->info.bus_info, dev_name(parent), + sizeof(rsp->info.bus_info)); + if (!rsp->info.driver[0] && parent && parent->driver) + strscpy(rsp->info.driver, parent->driver->name, + sizeof(rsp->info.driver)); + } else if (parent && parent->driver) { + strscpy(rsp->info.bus_info, dev_name(parent), sizeof(rsp->info.bus_info)); - strscpy(rsp->info.driver, dev->dev.parent->driver->name, + strscpy(rsp->info.driver, parent->driver->name, sizeof(rsp->info.driver)); } else if (dev->rtnl_link_ops) { strscpy(rsp->info.driver, dev->rtnl_link_ops->kind, -- cgit v1.2.3