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authorBob Copeland <me@bobcopeland.com>2013-04-18 18:26:49 -0400
committerJohannes Berg <johannes.berg@intel.com>2013-04-22 15:40:39 +0200
commit8ceb59557bdc373e532b87d4142ce27e04218f0e (patch)
tree95fab44394b51719702afc7bbe22789043be5f65 /net/mac80211/pm.c
parent908f8d07e9774c2476e0683f6a0ce50562a2da45 (diff)
downloadlinux-stericsson-8ceb59557bdc373e532b87d4142ce27e04218f0e.tar.gz
mac80211: use synchronize_rcu() with rcu_barrier()
The RCU docs used to state that rcu_barrier() included a wait for an RCU grace period; however the comments for rcu_barrier() as of commit f0a0e6f... "rcu: Clarify memory-ordering properties of grace-period primitives" contradict this. So add back synchronize_{rcu,net}() to where they once were, but keep the rcu_barrier()s for the call_rcu() callbacks. Cc: stable <stable@vger.kernel.org> Signed-off-by: Bob Copeland <bob@cozybit.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/pm.c')
-rw-r--r--net/mac80211/pm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
index 4431f0ffe157..7fc5d0d8149a 100644
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -38,6 +38,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
/* flush out all packets and station cleanup call_rcu()s */
+ synchronize_net();
rcu_barrier();
ieee80211_flush_queues(local, NULL);