[PATCH 4.19 10/55] staging: vt6656: correct packet types for CTS protect, mode.

Greg Kroah-Hartman
2020-01-30T18:50:05Z

From: Malcolm Priestley <tvboxspy@gmail.com>

commit d971fdd3412f8342747778fb59b8803720ed82b1 upstream.

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 <stable@vger.kernel.org>
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/9c1323ff-dbb3-0eaa-43e1-9453f7390dc0@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/staging/vt6656/device.h | 2 ++
drivers/staging/vt6656/rxtx.c | 12 ++++++++----
2 files changed, 10 insertions(+), 4 deletions(-)

--- 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
--- a/drivers/staging/vt6656/rxtx.c
+++ b/drivers/staging/vt6656/rxtx.c
@@ -815,10 +815,14 @@ int vnt_tx_packet(struct vnt_private *pr
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;