Hi all, (I added wireless-regdb at lists.infradead.org to recipients, the original mail is at http://marc.info/?l=linux-wireless&m=144499490005262) On Fri, Oct 16 2015, Johannes Berg wrote: > On Fri, 2015-10-16 at 13:28 +0200, Jan Kaisrlik wrote: >> The patch adds support for Intelligent Transportation System (ITS-G5) >> band as defined by ETSI EN 302 663 standard. This band is enabled by >> a new configuration option CFG80211_REG_ITSG5_BAND, which depends on >> CFG80211_CERTIFICATION_ONUS. > > That Kconfig option seems unnecessary - after all, the regulatory > database still has a say in this? I thought that the regdb is for unlicensed bands with unrestricted use. The 5.9 GHz band is not licensed but it is restricted for ITS applications. In http://marc.info/?l=linux-wireless&m=140183393707445&w=2 Luis Rodriguez suggested that having a Kconfig option may be the way to go, but we may misread what he was saying. I assume that if this band will be in regdb, it will be too easy to use this band (e.g. by mistake) for non-ITS applications. > Even the NL80211_RRF_ITSG5 flag seems somewhat unnecessary - if the > regulatory database did in fact provide information on these channels, > then we can assume they're usable, no? > > IOW - I don't really see the point of this patch - can't we treat these > channels just like regular ones, and rely on the regulatory information > to prevent their use in all but special scenarios (where the integrator > is providing a proper database)? Our goal is to make it easier for people to experiment with ITS in controlled environment (e.g. in a university lab). So you suggest that this should be enabled by providing custom regdb rather than recompiling the kernel with CFG80211_CERTIFICATION_ONUS? -Michal
