Hi, The patchset aims at making cfg80211 aware of channel switches. This makes it possible for more elegant channel switching behavior by moving the decision up to cfg80211. Until now mac80211 could start channel switching internally for STA, mesh and IBSS interfaces without userspace interaction. This bypassed interface combination checks at the very least. Now mac80211 requests cfg80211 to channel switch an interface, in a similar manner as userspace asks cfg80211 for a channel switch. This makes it possible to perform interface combination checks (albeit it is not implemented yet). The channel switch is split into two phases now - start and finalize. This is required to make cfg80211 in control of the whole channel switching process. It also makes it apparent that mac80211's STA CSA offload doesn't work quite well here. Can we kill it? The initial patchset has a lot of TODOs in the code and the idea is to provide follow up patches that implement missing functionality. Major drawback now is cfg80211 will refuse a channel switch if there's one in progress already, although this shouldn't be much of a problem in most use cases. This approach should be suited for multi-interface CSA as well as some other cases such as "GO-follows-STA". The patchset seemed to work in my limited testing (ath9k as AP and iwldvm as STA). Michal Kazior (2): mac80211: merge STA CSA code cfg80211: move channel switch logic to cfg80211 include/net/cfg80211.h | 80 ++++++++++++++++++++-- net/mac80211/cfg.c | 100 ++++++++++++++++++++------- net/mac80211/ibss.c | 4 +- net/mac80211/ieee80211_i.h | 6 +- net/mac80211/mesh.c | 6 +- net/mac80211/mlme.c | 133 +++++++++--------------------------- net/wireless/ap.c | 5 +- net/wireless/chan.c | 163 +++++++++++++++++++++++++++++++++++++++++++++ net/wireless/core.c | 23 +++++-- net/wireless/core.h | 18 +++++ net/wireless/ibss.c | 1 + net/wireless/mesh.c | 5 +- net/wireless/nl80211.c | 24 +++++-- net/wireless/rdev-ops.h | 21 ++++-- net/wireless/sme.c | 1 + net/wireless/trace.h | 17 ++++- net/wireless/util.c | 6 ++ 17 files changed, 454 insertions(+), 159 deletions(-) -- 1.8.5.3 -- 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
