linux-kernel - Re: linux-3.0-rc4, wlan0 device is not showing with ifconfig

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Date:	Mon, 27 Jun 2011 19:29:07 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephan Raue <mailinglists@...nelec.tv>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-3.0-rc4, wlan0 device is not showing with ifconfig

Le lundi 27 juin 2011 à 17:42 +0200, Stephan Raue a écrit :
> Hi,
> 
> running linux-3.0-rc4 my wlan0 device is not showing with ifconfig, even 
> if the driver (r8712u) loads successfull.
> 
> strace ifconfig shows:
> 
> ioctl(3, SIOCGIFFLAGS, {ifr_name="wlan0", 
> ifr_flags=IFF_BROADCAST|IFF_MULTICAST}) = 0
> ioctl(3, SIOCGIFHWADDR, {ifr_name="wlan0", 
> ifr_hwaddr=80:1f:02:0b:5d:9a}) = 0
> ioctl(3, SIOCGIFMETRIC, {ifr_name="wlan0", ifr_metric=0}) = 0
> ioctl(3, SIOCGIFMTU, {ifr_name="wlan0", ifr_mtu=1500}) = 0
> ioctl(3, SIOCGIFMAP, {ifr_name="wlan0", ifr_map={mem_start=0, mem_end=0, 
> base_addr=0, irq=0, dma=0, port=0}}) = 0
> ioctl(3, SIOCGIFTXQLEN, {ifr_name="wlan0", ifr_qlen=1000}) = 0
> ioctl(3, SIOCGIFADDR, {ifr_name="wlan0", ???}) = -1 EADDRNOTAVAIL 
> (Cannot assign requested address)
> close(3)                                = 0
> 
> the interface will be shown after i setup a ipadress manually:
> 
> ifconfig wlan0 192.68.0.13
> strace ifconfig
> 
> ioctl(3, SIOCGIFFLAGS, {ifr_name="wlan0", 
> ifr_flags=IFF_UP|IFF_BROADCAST|IFF_MULTICAST}) = 0
> ioctl(3, SIOCGIFHWADDR, {ifr_name="wlan0", 
> ifr_hwaddr=80:1f:02:0b:5d:9a}) = 0
> ioctl(3, SIOCGIFMETRIC, {ifr_name="wlan0", ifr_metric=0}) = 0
> ioctl(3, SIOCGIFMTU, {ifr_name="wlan0", ifr_mtu=1500}) = 0
> ioctl(3, SIOCGIFMAP, {ifr_name="wlan0", ifr_map={mem_start=0, mem_end=0, 
> base_addr=0, irq=0, dma=0, port=0}}) = 0
> ioctl(3, SIOCGIFTXQLEN, {ifr_name="wlan0", ifr_qlen=1000}) = 0
> ioctl(3, SIOCGIFADDR, {ifr_name="wlan0", ifr_addr={AF_INET, 
> inet_addr("168.0.0.13")}}) = 0
> ioctl(3, SIOCGIFDSTADDR, {ifr_name="wlan0", ifr_dstaddr={AF_INET, 
> inet_addr("168.0.0.13")}}) = 0
> ioctl(3, SIOCGIFBRDADDR, {ifr_name="wlan0", ifr_broadaddr={AF_INET, 
> inet_addr("168.0.255.255")}}) = 0
> ioctl(3, SIOCGIFNETMASK, {ifr_name="wlan0", ifr_netmask={AF_INET, 
> inet_addr("255.255.0.0")}}) = 0
> 
> is this problem known and is there a fix for this?

Pretty normal behavior, if your device is not "UP"

To see all devices, even DOWN ones, use "ifconfig -a"


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