mac80211: inform drivers about the off-channel status on channel changes

For some drivers it can be useful to know whether the channel they're
supposed to switch to is going to be used for short off-channel work or
scanning, or whether the hardware is expected to stay on it for a while
longer. This is important for various kinds of calibration work, which
takes longer to complete and should keep some persistent state, even if
the channel temporarily changes.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 20d372edec29..c7027ef51c75 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -625,11 +625,14 @@ struct ieee80211_rx_status {
  *      may turn the device off as much as possible. Typically, this flag will
  *      be set when an interface is set UP but not associated or scanning, but
  *      it can also be unset in that case when monitor interfaces are active.
+ * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main
+ *      operating channel.
  */
 enum ieee80211_conf_flags {
         IEEE80211_CONF_MONITOR          = (1<<0),
         IEEE80211_CONF_PS               = (1<<1),
         IEEE80211_CONF_IDLE             = (1<<2),
+        IEEE80211_CONF_OFFCHANNEL       = (1<<3),
 };