linux-kernel - Re: [PATCH] wireless-2.6 zd1211rw check against regulatory domain rather than hardcoded value of 11

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Date:	Mon, 30 Oct 2006 12:49:57 -0500
From:	"Holden Karau" <holden@...scanfly.ca>
To:	kune@...ne-taler.de
Cc:	"Daniel Drake" <dsd@...too.org>, zd1211-devs@...ts.sourceforge.net,
	linville@...driver.com, netdev <netdev@...r.kernel.org>,
	linux-kernel@...r.kernel.org, holdenk@...dros.com,
	"Johannes Berg" <johannes@...solutions.net>
Subject: Re: [PATCH] wireless-2.6 zd1211rw check against regulatory domain rather than hardcoded value of 11

Hi Ulrich,

I'm fairly certain the patch is safe, even for non-US regulatory domains.

Looking at the zd1211rw code the highest channel in the geo object
would appear to be set in zd_geo_init as determined by
zd_channel_range which just does a simple look up in channel_ranges[],
so if this code behaves correctly [and there is no indication it does
not], then setting the upper channel to be that in the geo object
would appear to be safe for any of the supported regulatory domains.

Cheers,

Holden :-)

On 10/30/06, Johannes Berg <johannes@...solutions.net> wrote:
>
> > I'm not so sure about this. This patching might be US-specific and we
> > cannot simply apply the setting for top channel of another domain
> > instead of channel 11. One option would be to set the value only under
> > the US regulatory domain.
>
> ??
> What the patch does is replace the top channel which is hardcoded to 11
> by the top channel given by the current regulatory domain. How can that
> be wrong? Except that you may want to init the regulatory domain from
> the EEPROM but I'm not sure how the ieee80211 code works wrt. that.
>
> johannes
>


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