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Date: Tue, 22 Mar 2022 07:01:01 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: Ziyang Xuan <william.xuanziyang@...wei.com>, davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org Cc: edumazet@...gle.com, brianvv@...gle.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH net-next v3 2/3] net: ipvlan: add net device refcount tracker On 3/19/22 02:53, Ziyang Xuan wrote: > Add net device refcount tracker to ipvlan. Just squash this to prior patch. Ideally all new dev_hold()/dev_put() should be dev_hold_track() and dev_put_track() > Signed-off-by: Ziyang Xuan <william.xuanziyang@...wei.com> > --- > drivers/net/ipvlan/ipvlan.h | 1 + > drivers/net/ipvlan/ipvlan_main.c | 4 ++-- > 2 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h > index 3837c897832e..6605199305b7 100644 > --- a/drivers/net/ipvlan/ipvlan.h > +++ b/drivers/net/ipvlan/ipvlan.h > @@ -64,6 +64,7 @@ struct ipvl_dev { > struct list_head pnode; > struct ipvl_port *port; > struct net_device *phy_dev; > + netdevice_tracker dev_tracker; > struct list_head addrs; > struct ipvl_pcpu_stats __percpu *pcpu_stats; > DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE); > diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c > index dcdc01403f22..be06f122092e 100644 > --- a/drivers/net/ipvlan/ipvlan_main.c > +++ b/drivers/net/ipvlan/ipvlan_main.c > @@ -160,7 +160,7 @@ static int ipvlan_init(struct net_device *dev) > port->count += 1; > > /* Get ipvlan's reference to phy_dev */ > - dev_hold(phy_dev); > + dev_hold_track(phy_dev, &ipvlan->dev_tracker, GFP_KERNEL); > > return 0; > } > @@ -674,7 +674,7 @@ static void ipvlan_dev_free(struct net_device *dev) > struct ipvl_dev *ipvlan = netdev_priv(dev); > > /* Get rid of the ipvlan's reference to phy_dev */ > - dev_put(ipvlan->phy_dev); > + dev_put_track(ipvlan->phy_dev, &ipvlan->dev_tracker); > } > > void ipvlan_link_setup(struct net_device *dev)
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