regression: no interfaces with rtl8180 driver post 2.6.28 git

regression: no interfaces with rtl8180 driver post 2.6.28 git

[Andi Kleen]

I got a 

06:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN Controller (rev 20)

PCI card in a box. With 2.6.28 it works (although rather poorly, always
seems to eventually fallback to 1Mbit/s). With post 2.6.28-git latest the card
is still detected, but no wlan0 interface is created anymore, only
wmaster0:

Some excerpts from the log.

rtl8180 0000:06:02.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
wmaster0 (rtl8180): not using net_device_ops yet
phy0: Selected rate control algorithm 'minstrel'
phy0: hwaddr 00:18:e7:49:f4:32, RTL8185vD + rtl8225z2

On 2.6.28 I get a wlan0 and roughly the same messages (except 
for the net_device_ops one, but I think that's harmless)

I first suspected udev, but there's no trace of wlan0 anywhere
in /sys, so it looks like it's not even create in kernel. 

Git tip 7d3b56ba37a95f1f370f50258ed3954c304c524b 
Userland is opensuse 11.1.  

-Andi

-- 
ak@linux.intel.com

Re: regression: no interfaces with rtl8180 driver post 2.6.28 git

[Fabio Rossi]

On Sunday 04 January 2009, Andi Kleen wrote:

> I got a
>
> 06:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8185 IEEE
> 802.11a/b/g Wireless LAN Controller (rev 20)
>
> PCI card in a box. With 2.6.28 it works (although rather poorly, always
> seems to eventually fallback to 1Mbit/s). With post 2.6.28-git latest the
> card is still detected, but no wlan0 interface is created anymore, only
> wmaster0:
>
> Some excerpts from the log.
>
> rtl8180 0000:06:02.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
> wmaster0 (rtl8180): not using net_device_ops yet
> phy0: Selected rate control algorithm 'minstrel'
> phy0: hwaddr 00:18:e7:49:f4:32, RTL8185vD + rtl8225z2
>
> On 2.6.28 I get a wlan0 and roughly the same messages (except
> for the net_device_ops one, but I think that's harmless)
>
> I first suspected udev, but there's no trace of wlan0 anywhere
> in /sys, so it looks like it's not even create in kernel.
>
> Git tip 7d3b56ba37a95f1f370f50258ed3954c304c524b
> Userland is opensuse 11.1.
>
> -Andi

It should be a known problem already fixed in wireless-testing: try the patch
http://article.gmane.org/gmane.linux.kernel.wireless.general/25813/match=rtl8180

Fabio