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qcacld-2.0: Report max MCS index 8 for VHT20

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Currently driver reports max MCS index 9 for VHT20, but cfg802.11
doesn't support such case, which leads to link speed null returned
to upper-layer.
Update the driver to report max MCS index 8 for VHT20.

Change-Id: I06c97db85d88decf418be602cb5f64135f61a686
CRs-Fixed: 1005141
This commit is contained in:
Hu Wang 2016-04-20 12:45:36 +08:00 committed by syphyr
parent fb0a49da7e
commit bff0ceef4a
1 changed files with 23 additions and 3 deletions
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26
drivers/net/wireless/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c
View file

@ -18321,11 +18321,17 @@ static int __wlan_hdd_cfg80211_get_station(struct wiphy *wiphy,
}
else if (DATA_RATE_11AC_MAX_MCS_9 == vhtMaxMcs)
{
//VHT20 is supporting 0~8
if (rate_flags & eHAL_TX_RATE_VHT20)
/*
* 'IEEE_P802.11ac_2013.pdf' page 325, 326
* - MCS9 is valid for VHT20 when Nss = 3 or Nss = 6
* - MCS9 is not valid for VHT20 when Nss = 1,2,4,5,7,8
*/
if ((rate_flags & eHAL_TX_RATE_VHT20) &&
(nss != 3 && nss != 6)) {
maxMCSIdx = 8;
else
} else {
maxMCSIdx = 9;
}
}
if (rssidx != 0)
@ -18432,6 +18438,20 @@ static int __wlan_hdd_cfg80211_get_station(struct wiphy *wiphy,
{
maxSpeedMCS = 1;
maxMCSIdx = pAdapter->hdd_stats.ClassA_stat.mcs_index;
/*
* 'IEEE_P802.11ac_2013.pdf' page 325, 326
* - MCS9 is valid for VHT20 when Nss = 3 or Nss = 6
* - MCS9 is not valid for VHT20 when Nss = 1,2,4,5,7,8
*/
if ((rate_flags & eHAL_TX_RATE_VHT20) &&
(maxMCSIdx > 8) &&
(nss != 3 && nss != 6)) {
#ifdef LINKSPEED_DEBUG_ENABLED
pr_info("MCS%d is not valid for VHT20 when nss=%d, hence report MCS8.",
maxMCSIdx, nss);
#endif
maxMCSIdx = 8;
}
}
}