netdev - Re: [2.6.31-rc1] iwlagn (4965): regression when hardware rf switch is used

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Message-Id: <200906291148.55386.elendil@planet.nl>
Date:	Mon, 29 Jun 2009 11:48:54 +0200
From:	Frans Pop <elendil@...net.nl>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	linux-wireless@...r.kernel.org, Netdev <netdev@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [2.6.31-rc1] iwlagn (4965): regression when hardware rf switch is used

On Monday 29 June 2009, Johannes Berg wrote:
> > [enable]
> > usb 3-1: new full speed USB device using uhci_hcd and address 3
> > usb 3-1: configuration #1 chosen from 1 choice
>
> That is completely unrelated. You plugged in a USB device too :)

No, it's my "bluetooth + wlan" device. Note that disabling wireless with 
the hardware switch also gives 'usb 3-1: USB disconnect, address 2'.

>From lsusb:
Bus 003 Device 002: ID 03f0:171d Hewlett-Packard Wireless (Bluetooth + 
WLAN) Interface [Integrated Module]

> > A lot uglier with those errors. And after that I have to run
> > ifdown/ifup before networking is up again (ifup only does not work as
> > it will complain "interface already configured"):
>
> And that's actually expected, and/or a bug in the debian networking
> scripts.
> (You can trigger the same problem by doing
> ifup wlan0
> ip link set wlan0 down
> ifup wlan0 -> error)

OK, I can accept that. Wonder why it does work with 2.6.30 then. But it 
can certainly wait until the driver problem you mentioned is resolved.

> To get your network connection back automatically we will require
> changes to userland tools to listen to rfkill events.
>
> > BTW, would it make sense to bring back the first two lines shown with
> > .30 (or at least the first one):
> >    iwlagn 0000:10:00.0: Radio Frequency Kill Switch is On:
> >    Kill switch must be turned off for wireless networking to work.
> > IMHO it's good to register the reason for the disconnect.
>
> I guess something like that could be added to cfg80211:
> phy0: taking interfaces down due to rfkill

Yes, that would be nice.

Thanks,
FJP
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