[MAC80211]: implement ERP info change notifications

zd1211rw and bcm43xx are interested in being notified when ERP IE conditions
change, so that they can reprogram a register which affects how control frames
are transmitted.

This patch adds an interface similar to the one that can be found in softmac.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 3282038a1510..e503cd37f82e 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -697,6 +697,14 @@ struct ieee80211_ops {
         void (*sta_table_notification)(struct ieee80211_hw *hw,
                                        int num_sta);
 
+        /* Handle ERP IE change notifications. Must be atomic. */
+        void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
+                               int cts_protection, int preamble);
+
+        /* Flags for the erp_ie_changed changes parameter */
+#define IEEE80211_ERP_CHANGE_PROTECTION (1<<0) /* protection flag changed */
+#define IEEE80211_ERP_CHANGE_PREAMBLE (1<<1) /* barker preamble mode changed */
+
         /* Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
          * bursting) for a hardware TX queue.
          * queue = IEEE80211_TX_QUEUE_*.