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@xxxxxxxxxxx>
---
I need something like this for properly getting rid of the ath9k sw
scanning callback and for fixing various calibration bugs.
--- 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),
};
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -111,12 +111,15 @@ int ieee80211_hw_config(struct ieee80211
if (scan_chan) {
chan = scan_chan;
channel_type = NL80211_CHAN_NO_HT;
+ local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
} else if (local->tmp_channel) {
chan = scan_chan = local->tmp_channel;
channel_type = local->tmp_channel_type;
+ local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
} else {
chan = local->oper_channel;
channel_type = local->_oper_channel_type;
+ local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
}
if (chan != local->hw.conf.channel ||
--
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