rt2x00: Support hardware RTS and CTS-to-self frames

If the driver has set the set_rts_threshold() callback function
to mac80211 it is capable of generating RTS and CTS-to-self frames
inside the hardware and rt2x00lib doesn't have to create them
in software.
Only rt2800pci and rt2800usb support this feature.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index c206b5092070..e46d406637f7 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -118,11 +118,16 @@ int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
          * create and queue that frame first. But make sure we have
          * at least enough entries available to send this CTS/RTS
          * frame as well as the data frame.
+         * Note that when the driver has set the set_rts_threshold()
+         * callback function it doesn't need software generation of
+         * neither RTS or CTS-to-self frames and handles everything
+         * inside the hardware.
          */
         frame_control = le16_to_cpu(ieee80211hdr->frame_control);
         if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) &&
             (control->flags & (IEEE80211_TXCTL_USE_RTS_CTS |
-                               IEEE80211_TXCTL_USE_CTS_PROTECT))) {
+                               IEEE80211_TXCTL_USE_CTS_PROTECT)) &&
+            !rt2x00dev->ops->hw->set_rts_threshold) {
                 if (rt2x00queue_available(queue) <= 1) {
                         ieee80211_stop_queue(rt2x00dev->hw, control->queue);
                         return NETDEV_TX_BUSY;