[rt2x00-users] [PATCH] rt2x00: fix use of mcs rates

[Helmut Schaa]

In case of mcs rates txrate->idx contains the mcs index to be used for
transmission. Previously the mcs values dedicated for legacy rates where
used for mcs transmissions which resulted in the use of mcs 0 in a number
of cases (e.g. for all mcs rates >= 15 as rt2x00 does not register legacy
rates with indexes >= 15).

Signed-off-by: Helmut Schaa <helmut.schaa at googlemail.com>
---
 drivers/net/wireless/rt2x00/rt2x00ht.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2x00ht.c b/drivers/net/wireless/rt2x00/rt2x00ht.c
index 382ab79..c004cd3 100644
--- a/drivers/net/wireless/rt2x00/rt2x00ht.c
+++ b/drivers/net/wireless/rt2x00/rt2x00ht.c
@@ -48,9 +48,18 @@ void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
 	txdesc->stbc =
 	    (tx_info->flags & IEEE80211_TX_CTL_STBC) >> IEEE80211_TX_CTL_STBC_SHIFT;
 
-	txdesc->mcs = rt2x00_get_rate_mcs(hwrate->mcs);
-	if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
-		txdesc->mcs |= 0x08;
+	/*
+	 * If IEEE80211_TX_RC_MCS is set txrate->idx just contains the
+	 * mcs rate to be used
+	 */
+	if (txrate->flags & IEEE80211_TX_RC_MCS) {
+		txdesc->mcs = txrate->idx;
+	} else {
+		txdesc->mcs = rt2x00_get_rate_mcs(hwrate->mcs);
+		if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
+			txdesc->mcs |= 0x08;
+	}
+
 
 	/*
 	 * Convert flags
-- 
1.6.4.2