From 43d3534344bbdcfa9c61a6b38490cd4cbb2f6bb6 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Fri, 15 Jan 2010 03:00:48 +0100 Subject: [PATCH] mac80211: force use_short_slot=true for 5GHz Normally 5GHz does not have a concept of long vs short slot time, however the slot time that it ends up using is the same as for 2.4 GHZ and use_short_slot == true Because of that, it makes more sense to force use_short_slot = true whenever 5 GHz is being used, so that this particular check does not have to be in every single driver that uses this flag. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- net/mac80211/cfg.c | 7 +++++++ net/mac80211/mlme.c | 2 ++ 2 files changed, 9 insertions(+) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 8286df5822d5..b0102c538b30 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1085,6 +1085,13 @@ static int ieee80211_change_bss(struct wiphy *wiphy, params->use_short_preamble; changed |= BSS_CHANGED_ERP_PREAMBLE; } + + if (!sdata->vif.bss_conf.use_short_slot && + sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) { + sdata->vif.bss_conf.use_short_slot = true; + changed |= BSS_CHANGED_ERP_SLOT; + } + if (params->use_short_slot_time >= 0) { sdata->vif.bss_conf.use_short_slot = params->use_short_slot_time; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 2746391248d3..a82564e73d91 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -670,6 +670,8 @@ static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, } use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); + if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) + use_short_slot = true; if (use_protection != bss_conf->use_cts_prot) { bss_conf->use_cts_prot = use_protection; -- 2.20.1