diff options
| author | Helmut Schaa <helmut.schaa@googlemail.com> | 2012-03-09 14:13:45 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-03-12 14:19:39 -0400 |
| commit | e9219779f943dfa1010ccbb63de14d49a47c43ee (patch) | |
| tree | d622df869844dfdb0b7f9ec465c3c0ca208713a4 /net/mac80211 | |
| parent | 3cc5240b5e036abb565c8ac7cffdcceb06a13517 (diff) | |
| download | lwn-e9219779f943dfa1010ccbb63de14d49a47c43ee.tar.gz lwn-e9219779f943dfa1010ccbb63de14d49a47c43ee.zip | |
mac80211: Disable MCS > 7 in minstrel_ht when STA uses static SMPS
Disable multi stream rates (MCS > 7) when a STA is in static SMPS mode
since it has only one active rx chain. Hence, it doesn't even make
sense to sample multi stream rates.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index ff5f7b84e825..2b42564d6e29 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -692,6 +692,7 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, int ack_dur; int stbc; int i; + unsigned int smps; /* fall back to the old minstrel for legacy stations */ if (!sta->ht_cap.ht_supported) @@ -731,6 +732,9 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, oper_chan_type != NL80211_CHAN_HT40PLUS) sta_cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; + smps = (sta_cap & IEEE80211_HT_CAP_SM_PS) >> + IEEE80211_HT_CAP_SM_PS_SHIFT; + for (i = 0; i < ARRAY_SIZE(mi->groups); i++) { u16 req = 0; @@ -748,6 +752,11 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, if ((sta_cap & req) != req) continue; + /* Mark MCS > 7 as unsupported if STA is in static SMPS mode */ + if (smps == WLAN_HT_CAP_SM_PS_STATIC && + minstrel_mcs_groups[i].streams > 1) + continue; + mi->groups[i].supported = mcs->rx_mask[minstrel_mcs_groups[i].streams - 1]; |