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Date: Sat, 4 Dec 2021 20:22:00 -0800 From: Eric Dumazet <eric.dumazet@...il.com> To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org> Cc: netdev <netdev@...r.kernel.org>, Eric Dumazet <edumazet@...gle.com>, Eric Dumazet <eric.dumazet@...il.com>, Dmitry Vyukov <dvyukov@...gle.com> Subject: [PATCH v3 net-next 06/23] net: add net device refcount tracker to ethtool_phys_id() From: Eric Dumazet <edumazet@...gle.com> This helper might hold a netdev reference for a long time, lets add reference tracking. Signed-off-by: Eric Dumazet <edumazet@...gle.com> --- net/ethtool/ioctl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index fa8aa5ec19ba1cfff611a159c5b8bcd02f74c5ca..9a113d89352123acf56ec598c191bb75985c6be5 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -1989,6 +1989,7 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) struct ethtool_value id; static bool busy; const struct ethtool_ops *ops = dev->ethtool_ops; + netdevice_tracker dev_tracker; int rc; if (!ops->set_phys_id) @@ -2008,7 +2009,7 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) * removal of the device. */ busy = true; - dev_hold(dev); + dev_hold_track(dev, &dev_tracker, GFP_KERNEL); rtnl_unlock(); if (rc == 0) { @@ -2032,7 +2033,7 @@ static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) } rtnl_lock(); - dev_put(dev); + dev_put_track(dev, &dev_tracker); busy = false; (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); -- 2.34.1.400.ga245620fadb-goog
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