[PATCH] ath6kl: Remove old 802.11a-only channels

[Valo, Kalle]

Johannes Berg <johannes at sipsolutions.net> writes:

> On Fri, 2017-03-10 at 10:11 +0100, Rostyslav Khudolii wrote:
>> On 10 March 2017 at 09:56, Johannes Berg <johannes at sipsolutions.net>
>> wrote:
>> > On Fri, 2017-03-10 at 09:49 +0100, Rostyslav Khudolii wrote:
>> > > Channels 34/38/42/46 can only be used for compatibility with
>> > > old devices sold in Japan. Modern products, such as AR6003/AR6004
>> > > don't support these channels.
>> > > Keeping them in the upstream is error prone and requires full
>> > > network stack support.
>> > 
>> > Seems pointless. Nothing in the network stack really cares much
>> > about
>> > the channel numbers, so what exactly does this improve?
>> > 
>> 
>> Without this one, a user is able to start an AP using wpa_supplicant,
>> for example, on one of these channels (34/38/42/46), without getting
>> any warning/error from the cfg80211 or ath6kl - which is correct
>> (since these channels match regdom rules). However, the AR6003 and
>> its
>> firmware (we're using v3.4.0.225) will fail and return
>> "WMI_CMDERROR_EVENTID" with "INVALID_PARAM" error code.
>> In my opinion, ath6kl shouldn't support anything the firmware
>> doesn't.
>> We should also handle WMI_CMDERROR_EVENTID properly (not just
>> printing
>> a message), but this is another problem, I believe.
>
> Ah. I didn't make the connection that AR6003 was actually a product
> that used this driver and thought you were using it as another peer and
> then the two couldn't make a connection...
>
> My bad.

I'll copy Rostyslav's description above to the commit log, I think it's
useful information to document.

-- 
Kalle Valo