D48295.diff
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	diff --git a/sys/dev/rtwn/rtl8812a/r12a_tx.c b/sys/dev/rtwn/rtl8812a/r12a_tx.c
	--- a/sys/dev/rtwn/rtl8812a/r12a_tx.c
	+++ b/sys/dev/rtwn/rtl8812a/r12a_tx.c
	@@ -103,11 +103,17 @@

	if (mode == IEEE80211_PROT_CTSONLY \|\|
	mode == IEEE80211_PROT_RTSCTS) {
	- /* TODO: VHT */
	- if (RTWN_RATE_IS_HT(ridx))
	+ /*
	+ * Note: this code assumes basic rates for protection for
	+ * both 802.11abg and 802.11n rates.
	+ */
	+ if (RTWN_RATE_IS_VHT(ridx))
	+ rate = rtwn_ctl_vhtrate(ic->ic_rt, ridx);
	+ else if (RTWN_RATE_IS_HT(ridx))
	rate = rtwn_ctl_mcsrate(ic->ic_rt, ridx);
	else
	rate = ieee80211_ctl_rate(ic->ic_rt, ridx2rate[ridx]);
	+ /* Map basic rate back to ridx */
	ridx = rate2ridx(IEEE80211_RV(rate));

	txd->txdw4 \|= htole32(SM(R12A_TXDW4_RTSRATE, ridx));