commit 077a9154898b374f20555adc3f620cccd02581d6
author Arik Nemtsov <arik@wizery.com> Sun Oct 23 08:21:41 2011 +0200
committer John W. Linville <linville@tuxdriver.com> Tue Nov 08 15:54:27 2011 -0500
tree 77549521a0633899874a2b7f694f240cd7e61414
parent 3b7b72eed19684824806b3fbefef653a180ef2b0

mac80211: support adding IV-room in the skb for CCMP keys

Some cards can generate CCMP IVs in HW, but require the space for the IV
to be pre-allocated in the frame at the correct offset. Add a key flag
that allows us to achieve this.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/key.c

diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 756b157..17a5220 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -133,9 +133,13 @@
 		key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
 
 		if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
-		      (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)))
+		      (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+		      (key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
 			sdata->crypto_tx_tailroom_needed_cnt--;
 
+		WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
+			(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV));
+
 		return 0;
 	}
 
@@ -178,7 +182,8 @@
 	sdata = key->sdata;
 
 	if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
-	      (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)))
+	      (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+	      (key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)))
 		increment_tailroom_need_count(sdata);
 
 	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)