From 29b4a4f7c7b588b5568edd0da42f38623b81fc66 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 21 Apr 2009 00:30:49 +0200 Subject: [PATCH] mac80211: fix IBSS code to not sleep while atomic With the RCU locking here we sleep while in an atomic context, since we can sleep just use mutex locking for the interface list instead of RCU. Sorry, seems I didn't get that in my UML test. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/ibss.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 4f7a54518be4..6030e003180c 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -784,14 +784,14 @@ void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) { struct ieee80211_sub_if_data *sdata; - rcu_read_lock(); - list_for_each_entry_rcu(sdata, &local->interfaces, list) { + mutex_lock(&local->iflist_mtx); + list_for_each_entry(sdata, &local->interfaces, list) { if (sdata->vif.type != NL80211_IFTYPE_ADHOC) continue; sdata->u.ibss.last_scan_completed = jiffies; ieee80211_sta_find_ibss(sdata); } - rcu_read_unlock(); + mutex_unlock(&local->iflist_mtx); } ieee80211_rx_result -- GitLab