commit 6d027bcc8a4e2518ae825b0ff3dd069ab1abfe96
author Luciano Coelho <luciano.coelho@intel.com> Wed Oct 08 09:48:37 2014 +0300
committer Johannes Berg <johannes.berg@intel.com> Thu Oct 09 11:30:08 2014 +0200
tree 798d3bfaf90f5f653905da6cb3be864f2a7a0443
parent e9a21949b79414dda42a017855b288901c07e613

mac80211: add pre_channel_switch driver operation

Some drivers may need to prepare for a channel switch also when it is
initiated from the remote side (eg. station, P2P client).  To make
this possible, add a generic callback that can be called for all
interface types.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/cfg.c

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 3a04f2e..647a2f6 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -3104,6 +3104,7 @@
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_channel_switch ch_switch;
 	struct ieee80211_chanctx_conf *conf;
 	struct ieee80211_chanctx *chanctx;
 	int err, changed = 0;
@@ -3139,6 +3140,10 @@
 		goto out;
 	}
 
+	err = drv_pre_channel_switch(sdata, &ch_switch);
+	if (err)
+		goto out;
+
 	err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
 					    chanctx->mode,
 					    params->radar_required);
@@ -3152,6 +3157,12 @@
 		goto out;
 	}
 
+	ch_switch.timestamp = 0;
+	ch_switch.device_timestamp = 0;
+	ch_switch.block_tx = params->block_tx;
+	ch_switch.chandef = params->chandef;
+	ch_switch.count = params->count;
+
 	err = ieee80211_set_csa_beacon(sdata, params, &changed);
 	if (err) {
 		ieee80211_vif_unreserve_chanctx(sdata);