ath5k: use short preamble when possible
ath5k previously ignored TX_RC_SHORT_PREAMBLE and did not use
config->use_short_preamble, so the long preamble was always
used for transmitted packets.
Changes-licensed-under: 3-Clause-BSD
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index 747b496..fc0ff71 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -1179,6 +1179,8 @@
struct ieee80211_rate *rate;
unsigned int mrr_rate[3], mrr_tries[3];
int i, ret;
+ u16 hw_rate;
+ u8 rc_flags;
flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
@@ -1186,9 +1188,15 @@
bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
PCI_DMA_TODEVICE);
+ rate = ieee80211_get_tx_rate(sc->hw, info);
+
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
flags |= AR5K_TXDESC_NOACK;
+ rc_flags = info->control.rates[0].flags;
+ hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
+ rate->hw_value_short : rate->hw_value;
+
pktlen = skb->len;
if (info->control.hw_key) {
@@ -1198,7 +1206,7 @@
ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
(sc->power_level * 2),
- ieee80211_get_tx_rate(sc->hw, info)->hw_value,
+ hw_rate,
info->control.rates[0].count, keyidx, 0, flags, 0, 0);
if (ret)
goto err_unmap;