From bd8dad29fa8ed36a2518bec8f95a8fe855517df7 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 14 Nov 2008 23:35:12 +0000
Subject: [PATCH] madwifi: ap+sta race conditions

SVN-Revision: 13208
---
 package/madwifi/files/lib/wifi/madwifi.sh   |  2 +-
 package/madwifi/patches/388-apsta_fix.patch | 60 +++++++++++++++++++++
 2 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 package/madwifi/patches/388-apsta_fix.patch

diff --git a/package/madwifi/files/lib/wifi/madwifi.sh b/package/madwifi/files/lib/wifi/madwifi.sh
index 5ce288f6e6..0ff9292600 100755
--- a/package/madwifi/files/lib/wifi/madwifi.sh
+++ b/package/madwifi/files/lib/wifi/madwifi.sh
@@ -42,7 +42,7 @@ scan_atheros() {
 		*) echo "$device: Invalid mode combination in config"; return 1;;
 	esac
 
-	config_set "$device" vifs "${ap:+$ap }${adhoc:+$adhoc }${ahdemo:+$ahdemo }${sta:+$sta }${wds:+$wds }${monitor:+$monitor}"
+	config_set "$device" vifs "${sta:+$sta }${ap:+$ap }${adhoc:+$adhoc }${ahdemo:+$ahdemo }${wds:+$wds }${monitor:+$monitor}"
 }
 
 
diff --git a/package/madwifi/patches/388-apsta_fix.patch b/package/madwifi/patches/388-apsta_fix.patch
new file mode 100644
index 0000000000..4952dd8913
--- /dev/null
+++ b/package/madwifi/patches/388-apsta_fix.patch
@@ -0,0 +1,60 @@
+--- a/net80211/ieee80211_proto.c
++++ b/net80211/ieee80211_proto.c
+@@ -1406,7 +1406,8 @@ __ieee80211_newstate(struct ieee80211vap
+ 	vap->iv_state = nstate;			/* state transition */
+ 	del_timer(&vap->iv_mgtsend);
+ 	if ((vap->iv_opmode != IEEE80211_M_HOSTAP) && 
+-			(ostate != IEEE80211_S_SCAN))
++			(ostate != IEEE80211_S_SCAN) &&
++			!(vap->iv_flags_ext & IEEE80211_FEXT_SCAN_PENDING))
+ 		ieee80211_cancel_scan(vap);	/* background scan */
+ 	ni = vap->iv_bss;			/* NB: no reference held */
+ 	switch (nstate) {
+@@ -1448,7 +1449,8 @@ __ieee80211_newstate(struct ieee80211vap
+ 			}
+ 			goto reset;
+ 		case IEEE80211_S_SCAN:
+-			ieee80211_cancel_scan(vap);
++			if (!(vap->iv_flags_ext & IEEE80211_FEXT_SCAN_PENDING))
++				ieee80211_cancel_scan(vap);
+ 			goto reset;
+ 		reset:
+ 			ieee80211_reset_bss(vap);
+@@ -1985,7 +1987,9 @@ ieee80211_newstate(struct ieee80211vap *
+ 					}
+ 				}
+ 			}
+-		} else if (dstate == IEEE80211_S_SCAN) {
++		} else if ((dstate == IEEE80211_S_SCAN) ||
++				(dstate == IEEE80211_S_AUTH) ||
++				(dstate == IEEE80211_S_ASSOC)) {
+ 			/* Force to scan pending... someone is scanning */
+ 			vap->iv_flags_ext |= IEEE80211_FEXT_SCAN_PENDING;
+ 			__ieee80211_newstate(vap, IEEE80211_S_INIT, arg);
+--- a/net80211/ieee80211_output.c
++++ b/net80211/ieee80211_output.c
+@@ -238,7 +238,9 @@ ieee80211_hardstart(struct sk_buff *skb,
+ 	}
+ 	
+ 	/* Cancel any running BG scan */
+-	if (!(ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN_THR) && (vap->iv_state == IEEE80211_S_RUN))
++	if (!(ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN_THR) &&
++		(vap->iv_state == IEEE80211_S_RUN) &&
++		(ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN))
+ 		ieee80211_cancel_scan(vap);
+ 
+ 	/* 
+--- a/net80211/ieee80211_wireless.c
++++ b/net80211/ieee80211_wireless.c
+@@ -2728,9 +2728,9 @@ ieee80211_ioctl_setparam(struct net_devi
+ 				return -EINVAL;
+ 			vap->iv_flags |= IEEE80211_F_BGSCAN;
+ 		} else {
+-			/* XXX racey? */
++			if (ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN)
++				ieee80211_cancel_scan(vap);	/* anything current */
+ 			vap->iv_flags &= ~IEEE80211_F_BGSCAN;
+-			ieee80211_cancel_scan(vap);	/* anything current */
+ 		}
+ 		break;
+ 	case IEEE80211_PARAM_BGSCAN_IDLE:
-- 
2.30.2