Currently, iwn(4) does not track HT protection changes because the
support code was broken and hence disabled.
Here's a fixed version which should allow us to enable HT protection
updates again.
Index: if_iwn.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_iwn.c,v
retrieving revision 1.165
diff -u -p -r1.165 if_iwn.c
--- if_iwn.c 28 Apr 2016 08:28:18 -0000 1.165
+++ if_iwn.c 25 May 2016 18:47:34 -0000
@@ -5046,11 +5046,8 @@ iwn_delete_key(struct ieee80211com *ic,
void
iwn_update_htprot(struct ieee80211com *ic, struct ieee80211_node *ni)
{
- /* XXX Disabled for now. It seems to cause output errors
- * (tx status=0x83) and to make block ack sessions degrade
- * into a half-working state. */
-#if 0
struct iwn_softc *sc = ic->ic_softc;
+ struct iwn_ops *ops = &sc->ops;
enum ieee80211_htprot htprot;
struct iwn_rxon_assoc rxon_assoc;
int s, error;
@@ -5072,11 +5069,19 @@ iwn_update_htprot(struct ieee80211com *i
rxon_assoc.rxchain = sc->rxon.rxchain;
rxon_assoc.acquisition = sc->rxon.acquisition;
+ s = splnet();
+
error = iwn_cmd(sc, IWN_CMD_RXON_ASSOC, &rxon_assoc,
sizeof(rxon_assoc), 1);
if (error != 0)
printf("%s: RXON_ASSOC command failed\n", sc->sc_dev.dv_xname);
-#endif
+
+ /* All RXONs wipe the firmware's txpower table. Restore it. */
+ error = ops->set_txpower(sc, 1);
+ if (error != 0)
+ printf("%s: could not set TX power\n", sc->sc_dev.dv_xname);
+
+ splx(s);
}
/*
