Re: Kernel Freeze, Atmel at79c505 (RFMD 2958), Fiberline FL-WL240U, usb-uhci.o

Hi,

On Mon, 12 Jan 2004, Klaus Franken wrote:

> Am Samstag, 10. Januar 2004 21:30 schrieb Joerg Albert:
>
> > > Does anyone have better experiences? Any other ideas?
> >
> > got my WL240U today. Your crash is caused by a driver bug, which is fixed
> > in 0.12beta5 (just checked in, avail. in the snapshot tomorrow).
> >
> > Unfortunately it just hid another problem: usb-uhci calls the driver's
> > disconnect procedure when the device got reset during startup leading to
> > _two_ wlanX netdev and a lot of trouble afterwards. uhci doesn't do that,
> > nor does the unified uhci-hcd of 2.6.x. I compared uhci and usb-uhci and
> > found a small patch to usb-uhci, which helped here (attached in case
> > anyone feels like patching usb-uhci and compiling a new kernel).
> >
> > The problem doesn't show up if you use an external hub.
> >
> > So I'd recommend to either try and use 0.11, if you must use usb-uhci
> > and cannot use an external USB hub or use >= 0.12beta5 with a patched
> > usb-uhci. This applies to 2.4.x kernels only.
>
> Hmm, I'm using 0.12beta5 with patched and unpatched usb-uhci.o without succes
> (kernel freezes and Opps ... ).
>
> But if I'm using an USB hub everything seems fine!

yes, I also still have problems (althrough no crashes anymore): with the
usb-uhci.o patch and 0.12beta5 wlan0 stays after the device is unplugged.
The kernel oopses on stopping the USB subsys. No cure yet :-/

IMHO the problem is that the software implementation of the virtual root
hub (i.e. the hub in the host controller) in usb-uhci.c differs to the one of
ordinary hubs, but I have no idea how a correct one looks like.

/Jörg