On 10 March 2017 at 09:56, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> 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.
