Re: [PATCH 2/2] cfg80211: Use 5MHz bandwidth by default when checking usable channels

[Johannes Berg <johannes@sipsolutions.net>]

On Sun, 2014-06-22 at 13:41 +0200, Felix Fietkau wrote:
> On 2014-04-15 14:37, Rostislav Lisovy wrote:
> > Current code checks if the 20MHz bandwidth is allowed for
> > particular channel -- if it is not, the channel is disabled.
> > Since we need to use 5/10 MHz channels, this code is modified in
> > the way that the default bandwidth to check is 5MHz. If the
> > maximum bandwidth allowed by the channel is smaller than 5MHz,
> > the channel is disabled. Otherwise the channel is used and the
> > flags are set according to the bandwidth allowed by the channel.
> > 
> > Signed-off-by: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>

> This change causes a regression and needs to be reverted or fixed.

Noted, I've reverted it in mac80211.git.

> It leaves Channel 12 enabled for US regdomain and does not prevent
> bringing up AP mode on it (IEEE80211_CHAN_NO_20MHZ does not get set).

I'm not sure this makes sense - CHAN_NO_20MHZ shouldn't get set on that
channel? It should be disabled for other reasons for AP mode - e.g.
NO_IR.

johannes