wifi: mac80211: introduce a feature flag for quiet in CSA

When doing CSA in multi-link, there really isn't a need to
stop transmissions entirely. Add a feature flag for drivers
to indicate they can handle quiet in CSA (be it by parsing
themselves, or by implementing drv_pre_channel_switch()),
to make that possible.

Also clean up the csa_block_tx handling: it clearly cannot
handle multi-link due to the way queues are stopped, move
it to the sdata. Drivers should be doing it themselves for
working properly during CSA in MLO anyway. Also rename it
to indicate that it reflects TX was blocked at mac80211.

Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240228095719.258439191541.I2469d206e2bf5cb244cfde2b4bbc2ae6d1cd3dd9@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index da320799fbff..cfd0c03e4bd6 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1034,7 +1034,6 @@ struct ieee80211_link_data {
 	struct ieee80211_key __rcu *default_beacon_key;
 
 	struct wiphy_work csa_finalize_work;
-	bool csa_block_tx;
 
 	bool operating_11g_mode;
 
@@ -1093,6 +1092,8 @@ struct ieee80211_sub_if_data {
 
 	unsigned long state;
 
+	bool csa_blocked_tx;
+
 	char name[IFNAMSIZ];
 
 	struct ieee80211_fragment_cache frags;