On Wed, 2013-02-06 at 12:02 -0600, Seth Forshee wrote: > > Ah, wl1251 is the weird thing that wants to be told when to wake up/go > > to sleep, and then sends nulldata packets itself ... so when we send > > nulldata packets *again* for off-channel, because it also uses software > > scanning. Like I said before -- "stupidest powersave implementation on > > the planet". > > Ah, I had wondered what hardware that code was there for :-) I was actually wrong -- wl1251 has HW scan so it doesn't matter. However, iwlegacy does this... > So I think the approach I'm advocating could possibly make things better > for wl1251. If it's told about going to off-channel powersave rather > than being told it's leaving powersave, maybe it can do the right thing > with the nullfunc frames without mac80211 generating the extra nullfunc. > I don't know that for sure though because I don't understand how the > hardware works. Probably not. For iwlegacy anyway it won't help. > > > So using these definition powersave is already a mandatory feature for > > > any hardware which uses software scanning. > > > > Even offloaded scanning, it's just not visible to mac80211 then. > > Okay, sure. I'm just thinking of things from the mac80211 perspective. Right, sure. > > > All I'm really doing is > > > making this explicit, and drivers would now opt in to being placed into > > > the doze state rather than opting into powersave in general. And of > > > course drivers are now told about transitions to the non-doze powersave > > > state (what I'm calling offchannel), so that drivers which need to do > > > hardware configuration for this state can do so. > > > > Ok, so maybe just calling it offchannel makes more sense, although that > > really interacts only this way with powersave in managed mode, in P2P GO > > mode .... oh well. > > I admit I've only been considering managed mode and know next to nothing > about P2P GO mode. If I'm creating problems for any other modes I'd > definitely like to know about it so I can take it into consideration. No no, I'm just saying there "powersave" could have even more meanings ... 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
