On Mon, 2008-10-20 at 10:43 -0600, Marcel Holtmann wrote: > I do wanna keep it as simple as possible, but on the other hand we > should do a pretty decent job with picking a regulatory domain when no > userspace is present (old or CRDA missing). > > So my current thinking is that the regulatory hint for a card is limited > to the frequencies the card actually registers with mac80211. If the > internal card is 2.4 GHz, then we limit the hint to this. So the 5 GHz > band is still a virgin. If a 5 GHz card comes along and it is the first > in its band, then we take its regulatory hint for that band, but for the > 2.4 GHz band it has to follow the first cards hint. > > As I mentioned before, first card wins is a perfect solution from my > point of view, but we should not punish a second card in a different > band if the first card is not touching this band at all. And I can see > these user scenarios happening and in some cases they might be done on > purpose to serve every band with a different piece of hardware. > > And for the cases where new bands might be used in the future. In that > case we do have to do this right since userspace might be outdated. Lets > face it, we should always support a new kernel with an old userspace. > That is how the Linux kernel is suppose to work. That is probably the > only reason why wireless extensions are still around ;) > > The idea of having a 2.4 GHz only card provide a hint for 5 GHz is just > plain wrong. If the hardware is designed for 2.4 GHz it should not mess > with other frequencies. > > So my solution would be first regulatory hint in each band wins. > > Also we should have printk that shows up in dmesg in cases where neither > crda or iw modified the regulatory domain and we have clash with the > hints provided by two or more cards. I totally agree with you. IIRC, the current situation is nobody is willing to implement the per-band regulatory hints for such a rare but valid case. Luis, will you accept patches if somebody else write it? Thanks, -yi -- 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
