On Wed, 2012-11-14 at 13:19 +0100, Michal Kazior wrote: > > However, then I realised that that still doesn't work -- once initial > > radar detection is done, it needs to continue while the AP is active. If > > the channel context was going to be relinquished, or even just the > > channel changed for a few seconds, it would be unsafe. So as a result, > > the radar detect operation has to somehow be coupled to the start AP > > operation and prohibit channel changes and additional channel contexts > > during the entire operation time. > > Hmm.. cfg80211 doesn't really know about channel contexts. > > The problem I see is that cfg80211 may be in a combination with > `num_different_channels = 1` and mac80211 can have 2 channel contexts > due to channel type incompatibilities. Yes, this is a concern, we need to fix that anyway though, otherwise it may assume that some operations are possible when they really aren't (e.g. starting an HT40+ and HT40- AP on the same channel, which shouldn't be done anyway, but still) > We'd need to tell cfg80211 that multi-interface is not possible when DFS > is active if we want to at least consider single-channel only DFS. Not sure about multi-interface, but multi-channel at least. johannes -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
