It appears that the driver still transmits in CTS protect mode even
though it is not enabled in mac80211.

That is both packet types PK_TYPE_11GA and PK_TYPE_11GB both use CTS protect.
The only difference between them GA does not use B rates.

Find if only B rate in GB or GA in protect mode otherwise transmit packets
as PK_TYPE_11A.

Cc: stable <sta...@vger.kernel.org>
Signed-off-by: Malcolm Priestley <tvbox...@gmail.com>
---
 drivers/staging/vt6656/device.h |  2 ++
 drivers/staging/vt6656/rxtx.c   | 12 ++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/vt6656/device.h b/drivers/staging/vt6656/device.h
index 50e1c8918040..e2fabe818b19 100644
--- a/drivers/staging/vt6656/device.h
+++ b/drivers/staging/vt6656/device.h
@@ -52,6 +52,8 @@
 #define RATE_AUTO      12
 
 #define MAX_RATE                       12
+#define VNT_B_RATES    (BIT(RATE_1M) | BIT(RATE_2M) |\
+                       BIT(RATE_5M) | BIT(RATE_11M))
 
 /*
  * device specific
diff --git a/drivers/staging/vt6656/rxtx.c b/drivers/staging/vt6656/rxtx.c
index f9020a4f7bbf..39b557511b24 100644
--- a/drivers/staging/vt6656/rxtx.c
+++ b/drivers/staging/vt6656/rxtx.c
@@ -815,10 +815,14 @@ int vnt_tx_packet(struct vnt_private *priv, struct 
sk_buff *skb)
                if (info->band == NL80211_BAND_5GHZ) {
                        pkt_type = PK_TYPE_11A;
                } else {
-                       if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
-                               pkt_type = PK_TYPE_11GB;
-                       else
-                               pkt_type = PK_TYPE_11GA;
+                       if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
+                               if (priv->basic_rates & VNT_B_RATES)
+                                       pkt_type = PK_TYPE_11GB;
+                               else
+                                       pkt_type = PK_TYPE_11GA;
+                       } else {
+                               pkt_type = PK_TYPE_11A;
+                       }
                }
        } else {
                pkt_type = PK_TYPE_11B;
-- 
2.24.0
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