Re: [Familiar] 0.8.4 udev rules - was: Re: v0.8.4-rc3 - wifi problem which doesn't exist underkernel 2.6.15-hh0

Hi Joshua,

On Thu, 2006-08-10 at 13:52 -0700, Joshua Layne wrote:
> ACTION=="add", DEVICE=="hostap_cs", SYSFS{func_id}=="0x06", 
> RUN+="/sbin/modprobe hostap_cs ignore_cis_vcc=1"
> 
> That is all my rule consists of and it works for the Netgear MA701
> 
> We are trying to not enter every single card in the udev rules (as was 
> done for /etc/pcmcia/hostap_cs.conf in previous versions) - hopefully 
> the flexibility of udev will allow us a bit more abstraction.
> 
> I would very much like to see this added to 0.8.4, but I have no control
> over that - I think Rene or Erik would have to include it.

The problem with this is that the VCC checking the driver does is a
safety measure. Setting ignore_cis_vcc=1 may result in operating
a 3.3V only card at 5V which will likely fry the card.

I'm fine with documenting this as a "use at your own risk" workaround
but I'm a bit reluctant to enable it by default. I'm also going to
remove similiar entries from other configuration files unless someone
comes up with a good explanation why those would be harmless.

Don't get me wrong, I appreciate the work you've done on this and
would love to make things work out of the box, but not at the risk
of frying anyone's hardware.

On a related note, I don't think a udev rule is the right place to
set options passed to kernel modules. This should probably go in
a file in /etc/modutils (or /etc/modprobe.d if the modprobe from
module-init-tools doesn't parse /etc/modutils/*conf any more).

Regards,

Rene

-- 
Rene Wagner
rw at handhelds dot org
4F33 7FD7 93B3 166B BADA  D6F8 71A1 FEA8 58B4 36D0

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