mac80211: track needed RX chains for channel contexts
On each channel that the device is operating on, it
may need to listen using one or more chains depending
on the SMPS settings of the interfaces using it. The
previous channel context changes completely removed
this ability (before, it was available as the SMPS
mode).
Add per-context tracking of the required static and
dynamic RX chains and notify the driver on changes.
To achieve this, track the chains and SMPS mode used
on each virtual interface and update the channel
context whenever this changes.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 9cb6280..2c8969b 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -372,14 +372,6 @@
}
EXPORT_SYMBOL(ieee80211_restart_hw);
-static void ieee80211_recalc_smps_work(struct work_struct *work)
-{
- struct ieee80211_local *local =
- container_of(work, struct ieee80211_local, recalc_smps);
-
- ieee80211_recalc_smps(local);
-}
-
#ifdef CONFIG_INET
static int ieee80211_ifa_changed(struct notifier_block *nb,
unsigned long data, void *arg)
@@ -667,7 +659,6 @@
INIT_WORK(&local->restart_work, ieee80211_restart_work);
INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
- INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work);
local->smps_mode = IEEE80211_SMPS_OFF;
INIT_WORK(&local->dynamic_ps_enable_work,
@@ -773,6 +764,8 @@
if (hw->max_report_rates == 0)
hw->max_report_rates = hw->max_rates;
+ local->rx_chains = 1;
+
/*
* generic code guarantees at least one band,
* set this very early because much code assumes
@@ -804,6 +797,13 @@
max_bitrates = sband->n_bitrates;
supp_ht = supp_ht || sband->ht_cap.ht_supported;
supp_vht = supp_vht || sband->vht_cap.vht_supported;
+
+ if (sband->ht_cap.ht_supported)
+ local->rx_chains =
+ max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
+ local->rx_chains);
+
+ /* TODO: consider VHT for RX chains, hopefully it's the same */
}
local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +