[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, 10 insertions, 6 deletions

diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index 8292431ac48f..1fde214faecb 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -1054,17 +1054,21 @@ static int ieee80211_ioctl_prism2_param(struct net_device *dev,
                 break;
 
         case PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES:
-                if (sdata->type != IEEE80211_IF_TYPE_AP)
+                if (sdata->type == IEEE80211_IF_TYPE_AP) {
+                        sdata->use_protection = !!value;
+                        ieee80211_erp_info_change_notify(dev, IEEE80211_ERP_CHANGE_PROTECTION);
+                } else {
                         ret = -ENOENT;
-                else
-                        sdata->use_protection = value;
+                }
                 break;
 
         case PRISM2_PARAM_PREAMBLE:
-                if (sdata->type != IEEE80211_IF_TYPE_AP)
+                if (sdata->type != IEEE80211_IF_TYPE_AP) {
+                        sdata->short_preamble = !!value;
+                        ieee80211_erp_info_change_notify(dev, IEEE80211_ERP_CHANGE_PREAMBLE);
+                } else {
                         ret = -ENOENT;
-                else
-                        sdata->short_preamble = value;
+                }
                 break;
 
         case PRISM2_PARAM_STAT_TIME: