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authorSenthil Balasubramanian <senthilkumar@atheros.com>2009-06-24 18:56:42 +0530
committerJohn W. Linville <linville@tuxdriver.com>2009-07-10 15:02:24 -0400
commit140add21356528fc76ad276fd32b2e7abb945325 (patch)
treed056ec608bcf0b54a224114186f139cff27d1cad /drivers
parente5f0921a9593365b506f69daa3cfd19c0ed1340b (diff)
ath9k: Handle different TX and RX streams properly.
This patch fixes an issue when the TX and RX streams are different. Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/ath/ath9k/main.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 52dfa43bc52..961b0ce6ef3 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -889,6 +889,7 @@ static void setup_ht_cap(struct ath_softc *sc,
{
#define ATH9K_HT_CAP_MAXRXAMPDU_65536 0x3 /* 2 ^ 16 */
#define ATH9K_HT_CAP_MPDUDENSITY_8 0x6 /* 8 usec */
+ u8 tx_streams, rx_streams;
ht_info->ht_supported = true;
ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
@@ -901,21 +902,22 @@ static void setup_ht_cap(struct ath_softc *sc,
/* set up supported mcs set */
memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
+ tx_streams = !(sc->tx_chainmask & (sc->tx_chainmask - 1)) ? 1 : 2;
+ rx_streams = !(sc->rx_chainmask & (sc->rx_chainmask - 1)) ? 1 : 2;
- switch(sc->rx_chainmask) {
- case 1:
- ht_info->mcs.rx_mask[0] = 0xff;
- break;
- case 3:
- case 5:
- case 7:
- default:
- ht_info->mcs.rx_mask[0] = 0xff;
- ht_info->mcs.rx_mask[1] = 0xff;
- break;
+ if (tx_streams != rx_streams) {
+ DPRINTF(sc, ATH_DBG_CONFIG, "TX streams %d, RX streams: %d\n",
+ tx_streams, rx_streams);
+ ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
+ ht_info->mcs.tx_params |= ((tx_streams - 1) <<
+ IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
}
- ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
+ ht_info->mcs.rx_mask[0] = 0xff;
+ if (rx_streams >= 2)
+ ht_info->mcs.rx_mask[1] = 0xff;
+
+ ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
}
static void ath9k_bss_assoc_info(struct ath_softc *sc,