openwrtv4/package/kernel/mac80211/patches/902-wlcore-don-t-switch-channels-on-disconnected-STA-vif.patch

From 4101e8dc540d19f1f6c24930629149191786e4cd Mon Sep 17 00:00:00 2001
From: Arik Nemtsov <arik@wizery.com>
Date: Mon, 9 Sep 2013 16:48:59 +0300
Subject: [PATCH 27/75] wlcore: don't switch channels on disconnected STA vifs

Sending the FW a channel switch command on a disconnected vif may result
in a beacon loss event. Avoid this edge case.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
---
 drivers/net/wireless/ti/wlcore/main.c | 7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -5181,6 +5181,10 @@ static void wl12xx_op_channel_switch(str
 	if (unlikely(wl->state == WLCORE_STATE_OFF)) {
 		wl12xx_for_each_wlvif_sta(wl, wlvif) {
 			struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
+
+			if (!test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
+				continue;
+
 			ieee80211_chswitch_done(vif, false);
 		}
 		goto out;
@@ -5196,6 +5200,9 @@ static void wl12xx_op_channel_switch(str
 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
 		unsigned long delay_usec;
 
+		if (!test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
+			continue;
+
 		ret = wl->ops->channel_switch(wl, wlvif, ch_switch);
 		if (ret)
 			goto out_sleep;