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Date: Sat, 28 Oct 2017 08:48:16 +0200 From: Oliver Hartkopp <socketcan@...tkopp.net> To: SF Markus Elfring <elfring@...rs.sourceforge.net>, linux-can@...r.kernel.org, netdev@...r.kernel.org, Marc Kleine-Budde <mkl@...gutronix.de>, Wolfgang Grandegger <wg@...ndegger.com> Cc: LKML <linux-kernel@...r.kernel.org>, kernel-janitors@...r.kernel.org Subject: Re: [PATCH] can: Use common error handling code in vxcan_newlink() Hi Markus, On 10/27/2017 10:30 PM, SF Markus Elfring wrote: > From: Markus Elfring <elfring@...rs.sourceforge.net> > Date: Fri, 27 Oct 2017 22:22:24 +0200 > > * Add a jump target so that a bit of exception handling can be better > reused at the end of this function. > > * Adjust two condition checks. > > This issue was detected by using the Coccinelle software. > > Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net> > --- > drivers/net/can/vxcan.c | 16 ++++++++-------- > 1 file changed, 8 insertions(+), 8 deletions(-) > > diff --git a/drivers/net/can/vxcan.c b/drivers/net/can/vxcan.c > index 8404e8852a0f..97f250cbc4ff 100644 > --- a/drivers/net/can/vxcan.c > +++ b/drivers/net/can/vxcan.c > @@ -227,10 +227,8 @@ static int vxcan_newlink(struct net *net, struct net_device *dev, > netif_carrier_off(peer); > > err = rtnl_configure_link(peer, ifmp); > - if (err < 0) { > - unregister_netdevice(peer); > - return err; > - } > + if (err) > + goto unregister_network_device; You are changing semantic in the if-statement here. I would be fine with the patch if you revert that if-statement as I would like to stay on the behavior from veth.c in veth_newlink(). Regards, Oliver > > /* register first device */ > if (tb[IFLA_IFNAME]) > @@ -239,10 +237,8 @@ static int vxcan_newlink(struct net *net, struct net_device *dev, > snprintf(dev->name, IFNAMSIZ, DRV_NAME "%%d"); > > err = register_netdevice(dev); > - if (err < 0) { > - unregister_netdevice(peer); > - return err; > - } > + if (err) > + goto unregister_network_device; > > netif_carrier_off(dev); > > @@ -254,6 +250,10 @@ static int vxcan_newlink(struct net *net, struct net_device *dev, > rcu_assign_pointer(priv->peer, dev); > > return 0; > + > +unregister_network_device: > + unregister_netdevice(peer); > + return err; > } > > static void vxcan_dellink(struct net_device *dev, struct list_head *head) >
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