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rtl8187: make CTS-to-self protection work

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CTS protection was not working properly because the HW needs
RTS flag to be asserted, and it need also RTS duration field to be
filled with CTS-to-self duration.

This patch makes the driver to do this.

Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Andrea Merello 2014-05-07 17:54:46 +02:00 committed by John W. Linville
parent 5d0d1e9489
commit d294d0286a
1 changed files with 8 additions and 1 deletions
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9
drivers/net/wireless/rtl818x/rtl8187/dev.c
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@ -253,14 +253,21 @@ static void rtl8187_tx(struct ieee80211_hw *dev,
flags |= ieee80211_get_tx_rate(dev, info)->hw_value << 24;
if (ieee80211_has_morefrags(tx_hdr->frame_control))
flags |= RTL818X_TX_DESC_FLAG_MOREFRAG;
/* HW will perform RTS-CTS when only RTS flags is set.
* HW will perform CTS-to-self when both RTS and CTS flags are set.
* RTS rate and RTS duration will be used also for CTS-to-self.
*/
if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
flags |= RTL818X_TX_DESC_FLAG_RTS;
flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
rts_dur = ieee80211_rts_duration(dev, priv->vif,
skb->len, info);
} else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
flags |= RTL818X_TX_DESC_FLAG_CTS;
flags |= RTL818X_TX_DESC_FLAG_RTS | RTL818X_TX_DESC_FLAG_CTS;
flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
rts_dur = ieee80211_ctstoself_duration(dev, priv->vif,
skb->len, info);
}
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {