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authorHelmut Schaa <helmut.schaa@googlemail.com>2012-03-09 17:13:45 +0400
committerJohn W. Linville <linville@tuxdriver.com>2012-03-12 22:19:39 +0400
commite9219779f943dfa1010ccbb63de14d49a47c43ee (patch)
treed622df869844dfdb0b7f9ec465c3c0ca208713a4 /net/mac80211/rc80211_minstrel_ht.c
parent3cc5240b5e036abb565c8ac7cffdcceb06a13517 (diff)
downloadlinux-e9219779f943dfa1010ccbb63de14d49a47c43ee.tar.xz
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/rc80211_minstrel_ht.c')
-rw-r--r--net/mac80211/rc80211_minstrel_ht.c9
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];