From ef8b5fda8d3d22bbc113101ddcc92ef950a8dc9a Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 14 Sep 2012 13:37:30 +0000
Subject: mac80211: fix regdb locking issues

SVN-Revision: 33398
---
 package/mac80211/patches/300-pending_work.patch | 35 +++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'package/mac80211/patches/300-pending_work.patch')

diff --git a/package/mac80211/patches/300-pending_work.patch b/package/mac80211/patches/300-pending_work.patch
index 66f1abb63e..183a86221b 100644
--- a/package/mac80211/patches/300-pending_work.patch
+++ b/package/mac80211/patches/300-pending_work.patch
@@ -327,3 +327,38 @@
  	priv->tsf_high32 = 0;
  	priv->tsf_low32 = 0;
  
+--- a/net/wireless/reg.c
++++ b/net/wireless/reg.c
+@@ -352,6 +352,9 @@ static void reg_regdb_search(struct work
+ 	struct reg_regdb_search_request *request;
+ 	const struct ieee80211_regdomain *curdom, *regdom;
+ 	int i, r;
++	bool set_reg = false;
++
++	mutex_lock(&cfg80211_mutex);
+ 
+ 	mutex_lock(&reg_regdb_search_mutex);
+ 	while (!list_empty(&reg_regdb_search_list)) {
+@@ -367,9 +370,7 @@ static void reg_regdb_search(struct work
+ 				r = reg_copy_regd(&regdom, curdom);
+ 				if (r)
+ 					break;
+-				mutex_lock(&cfg80211_mutex);
+-				set_regdom(regdom);
+-				mutex_unlock(&cfg80211_mutex);
++				set_reg = true;
+ 				break;
+ 			}
+ 		}
+@@ -377,6 +378,11 @@ static void reg_regdb_search(struct work
+ 		kfree(request);
+ 	}
+ 	mutex_unlock(&reg_regdb_search_mutex);
++
++	if (set_reg)
++		set_regdom(regdom);
++
++	mutex_unlock(&cfg80211_mutex);
+ }
+ 
+ static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
-- 
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