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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>
This commit is contained in:
Ivo van Doorn 2008-04-21 18:59:48 +02:00 committed by John W. Linville
parent e40ac414c0
commit 2d9ccf8429
1 changed files with 6 additions and 1 deletions
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7
drivers/net/wireless/rt2x00/rt2x00mac.c
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@ -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 * create and queue that frame first. But make sure we have
* at least enough entries available to send this CTS/RTS * at least enough entries available to send this CTS/RTS
* frame as well as the data frame. * 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); frame_control = le16_to_cpu(ieee80211hdr->frame_control);
if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) && if (!is_rts_frame(frame_control) && !is_cts_frame(frame_control) &&
(control->flags & (IEEE80211_TXCTL_USE_RTS_CTS | (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) { if (rt2x00queue_available(queue) <= 1) {
ieee80211_stop_queue(rt2x00dev->hw, control->queue); ieee80211_stop_queue(rt2x00dev->hw, control->queue);
return NETDEV_TX_BUSY; return NETDEV_TX_BUSY;