diff options
| author | Hu Wang <huw@codeaurora.org> | 2016-08-25 15:15:54 +0800 |
|---|---|---|
| committer | qcabuildsw <qcabuildsw@localhost> | 2016-10-18 09:03:03 -0700 |
| commit | 1f2b8a899bcff3f8803e356c1709a24e2259240e (patch) | |
| tree | e014e877a4af0005c95208c87d45f803329679d7 | |
| parent | e22c4a0e678548013490787d1d29f7b0bfdc453d (diff) | |
qcacld-3.0: Report max MCS index 8 for VHT20
qcacld-2.0 to qcacld-3.0 propagation
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
| -rw-r--r-- | core/hdd/src/wlan_hdd_stats.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/core/hdd/src/wlan_hdd_stats.c b/core/hdd/src/wlan_hdd_stats.c index 6a1fc5a57085..c24dfe39d2c2 100644 --- a/core/hdd/src/wlan_hdd_stats.c +++ b/core/hdd/src/wlan_hdd_stats.c @@ -1864,8 +1864,15 @@ static int __wlan_hdd_cfg80211_get_station(struct wiphy *wiphy, maxMCSIdx = 8; 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 maxMCSIdx = 9; @@ -1973,6 +1980,18 @@ 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)) { + maxMCSIdx = 8; + } } } |