Hey Gertjan,
Am Sonntag, 26. August 2012, 20:22:56 schrieb Gertjan van Wingerde:
> Hi Andreas,
>
> On 08/23/12 20:51, Andreas Messer wrote:
> > Hey there,
> >
> > Am Dienstag, 24. Juli 2012, 19:33:34 schrieb Andreas Messer:
> >> Hello Again,
> >>
> >> Am Dienstag, 26. Juni 2012, 13:18:35 schrieb John W. Linville:
> >>> On Tue, Jun 26, 2012 at 06:03:56PM +0200, Andreas Messer wrote:
> >>>> Dear all,
> >>>>
> >>>> updating my pc from linux kernel 3.3 to linux kernel 3.4 broke my wlan.
> >
> > I have spent some more time on investigating the cause of the bug and
> > found
> > the problem. Actually I'm not sure which is the right solution. The
> > problem is caused by the following points:
> >
> > 1) The rt73 hardware registers are not initialized before bringing the
> >
> > corresponding network interface up ('ifconfig wlan0 up')
> >
> > 2) Bringing the interface up is not possible because of the kill switch
> >
> > 3) The GPIO input pin for the kill switch is still in 'output mode' (the
> >
> > default power on value), therefore the register will always read
> > 'killswitch on'
> >
> > [...]
> [...]
> The reason why we do most of the initialization at interface up is that
> that is the earliest possible time we can get the firmware image from
> userspace. A lot of the register programming we have to do for
> initialization depend on the firmware being uploaded and running, hence
> we initialize most at interface up time.
> [...]
Thanks for that explanation. Didn't know that about the firmware.
> Find attached a patch that does this for all the rt2x00 devices. I hope
> you are able to test whether this patch fixes the problem for you.
Yep, the patch works fine for me. (Tested on latest git snapshot)
Cheers
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