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rtl8180: make CTS-to-self protection work

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CTS protection was not working properly because the HW still need
RTS flag to be asserted, and it need also RTS rate field to be
set with CTS-to-self rate and 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 17:53:17 +02:00 committed by John W. Linville
parent e58342d9c8
commit 5d0d1e9489
1 changed files with 10 additions and 5 deletions
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15
drivers/net/wireless/rtl818x/rtl8180/dev.c
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@ -463,18 +463,23 @@ static void rtl8180_tx(struct ieee80211_hw *dev,
RTL818X_TX_DESC_FLAG_NO_ENC;
rc_flags = info->control.rates[0].flags;
/* 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 (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
tx_flags |= RTL818X_TX_DESC_FLAG_RTS;
tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
rts_duration = ieee80211_rts_duration(dev, priv->vif,
skb->len, info);
} else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
tx_flags |= RTL818X_TX_DESC_FLAG_CTS;
tx_flags |= RTL818X_TX_DESC_FLAG_RTS | RTL818X_TX_DESC_FLAG_CTS;
tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
rts_duration = ieee80211_ctstoself_duration(dev, priv->vif,
skb->len, info);
}
if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
rts_duration = ieee80211_rts_duration(dev, priv->vif, skb->len,
info);
if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
unsigned int remainder;