mac80211: add support for parsing ADDBA_EXT IEs

ADDBA_EXT IEs can be used to negotiate the BA fragmentation level.

Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/20190713163642.18491-2-john@phrozen.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 1b224fa..3441558 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1200,6 +1200,13 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 
 			elems->cisco_dtpc_elem = pos;
 			break;
+		case WLAN_EID_ADDBA_EXT:
+			if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->addba_ext_ie = (void *)pos;
+			break;
 		case WLAN_EID_TIMEOUT_INTERVAL:
 			if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
 				elems->timeout_int = (void *)pos;