On 23 January 2014 07:31, Luca Coelho <luca@xxxxxxxxx> wrote: > On Thu, 2014-01-23 at 07:22 +0100, Michal Kazior wrote: >> On 22 January 2014 16:13, Luca Coelho <luca@xxxxxxxxx> wrote: >> > On Wed, 2014-01-22 at 16:10 +0100, Johannes Berg wrote: >> >> On Wed, 2014-01-22 at 14:36 +0200, Luca Coelho wrote: >> >> >> >> > I don't think we should try to merge the channel switches. We should >> >> > just perform them separately, especially because the exact time of the >> >> > switch will most likely not be the same (since the TBTTs are not in >> >> > sync). >> >> >> >> Do you mean that we shouldn't even have all that new API to switch >> >> multiple interfaces simultaneously? >> > >> > Right, I'm not really sure it's necessary. PErhaps with non-chanctx we >> > need something like that, but maybe it would still be better not to do >> > this in the nl80211 API, but sync/merge in cfg80211/mac80211? >> >> I was thinking about it. This should work, mostly, as long as you're >> able to submit CSA requests fast enough and you don't use count 0 or >> 1, in which case it becomes racy. > > CSA with count 0 or 1 are really tricky in many respects. But still I > don't see why it would get racy. The interfaces will switch > independently, making their own chanctx reservations and so on... You can't really switch multiple interfaces independently with a single-channel hardware. You'll either end up with some interfaces disconnected or dragged to a different channel forcefully. Michał -- 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
