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Re: "ADDRCONF(NETDEV_UP): eth0: link is not ready" with IPv6 |
On Tue, 2012-07-03 at 18:15 +0200, Nicolas Ferre wrote: > On 07/03/2012 05:47 PM, Arvid Brodin : > > (Added MACB "patch" contact Nicolas Ferre to CC list.) > > Hi, > > (adding linux-arm-kernel) > > > On 2012-06-29 17:24, Ben Hutchings wrote: > >> On Fri, 2012-06-29 at 02:36 +0000, Arvid Brodin wrote: > >>> Hi, > >>> > >>> After 'ip link set eth0 up' on an avr32 board (network driver macb), the device ends up in > >>> operational mode "UNKNOWN": > >>> > >>> # ip link > >>> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000 > >>> link/ether 00:24:74:00:17:9d brd ff:ff:ff:ff:ff:ff > >>> > >>> Unplugging and plugging in the network cable gets the device to mode "UP". > >>> > >>> This is a problem for me because I'm trying to use this device as a "slave" device (for a > >>> virtual HSR device*) and I need to be able to decide if the slave device is operational or > >>> not. > >>> > >>> Following Stephen's advice here: > >>> http://kerneltrap.org/mailarchive/linux-netdev/2008/9/24/3398834 I checked the macb.c code > >>> and noticed they do not call netif_carrier_off() neither before register_netdev() nor in > >>> dev_open(). > > > >> It should be called after register_netdev() and before the driver's > >> ndo_open implementation returns. > > After having read several drivers, it seems that some are calling > netif_carrier_off() *before* register_netdev() and some *after*... What > is the proper way? [...] The latter is correct; the former is a bug that is tolerated for now: http://article.gmane.org/gmane.linux.network/111355/ Ben. -- Ben Hutchings, Staff Engineer, Solarflare Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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