From 5d8e4237d2dc73b51ac66dc612c5c42dd7424479 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Tue, 11 Sep 2012 10:17:11 +0200
Subject: [PATCH] mac80211: change locking around ieee80211_recalc_smps
Make the function acquire the necessary mutex itself
to simplify the callers.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
net/mac80211/cfg.c | 2 --
net/mac80211/main.c | 2 --
net/mac80211/mlme.c | 2 +-
net/mac80211/util.c | 7 ++++---
4 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 00e31b488adc..9bd56a744982 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2070,9 +2070,7 @@ int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
*/
if (!sdata->u.mgd.associated ||
sdata->vif.bss_conf.channel_type == NL80211_CHAN_NO_HT) {
- mutex_lock(&sdata->local->iflist_mtx);
ieee80211_recalc_smps(sdata->local);
- mutex_unlock(&sdata->local->iflist_mtx);
return 0;
}
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 416e85eae2d2..c80c4490351c 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -364,9 +364,7 @@ static void ieee80211_recalc_smps_work(struct work_struct *work)
struct ieee80211_local *local =
container_of(work, struct ieee80211_local, recalc_smps);
- mutex_lock(&local->iflist_mtx);
ieee80211_recalc_smps(local);
- mutex_unlock(&local->iflist_mtx);
}
#ifdef CONFIG_INET
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 45a9fa63b368..2dbd9e1e3583 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1348,9 +1348,9 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
mutex_lock(&local->iflist_mtx);
ieee80211_recalc_ps(local, -1);
- ieee80211_recalc_smps(local);
mutex_unlock(&local->iflist_mtx);
+ ieee80211_recalc_smps(local);
ieee80211_recalc_ps_vif(sdata);
netif_tx_start_all_queues(sdata->dev);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 2017904c69cc..22ca35054dd0 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1606,14 +1606,13 @@ static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
return 0;
}
-/* must hold iflist_mtx */
void ieee80211_recalc_smps(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata;
enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
int count = 0;
- lockdep_assert_held(&local->iflist_mtx);
+ mutex_lock(&local->iflist_mtx);
/*
* This function could be improved to handle multiple
@@ -1642,12 +1641,14 @@ void ieee80211_recalc_smps(struct ieee80211_local *local)
}
if (smps_mode == local->smps_mode)
- return;
+ goto unlock;
set:
local->smps_mode = smps_mode;
/* changed flag is auto-detected for this */
ieee80211_hw_config(local, 0);
+ unlock:
+ mutex_unlock(&local->iflist_mtx);
}
static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)