broadcom-wl patch that fixes the crash on multi-AP environment

noroaming.patch

--- a/src/wl/sys/wl_cfg80211_hybrid.c	2017-05-19 20:39:02.140010833 +0200
+++ b/src/wl/sys/wl_cfg80211_hybrid.c	2017-05-19 20:40:19.216011777 +0200
@@ -2153,8 +2153,12 @@
 	WL_DBG(("\n"));

 	if (status == WLC_E_STATUS_SUCCESS) {
-		err = wl_bss_roaming_done(wl, ndev, e, data);
+		if (!wl_bss_roaming_done(wl, ndev, e, data)) {
 		wl->profile->active = true;
+		} else {
+			wl_link_down(wl);
+			wl_init_prof(wl->profile);
+		}
 	}

 	return err;
@@ -2360,10 +2364,30 @@
 	struct wl_cfg80211_connect_info *conn_info = wl_to_conn(wl);
 	s32 err = 0;

+	struct wireless_dev *wdev;
+	struct cfg80211_bss *bss;
+
 	wl_get_assoc_ies(wl);
 	memcpy(wl->profile->bssid, &e->addr, ETHER_ADDR_LEN);
 	memcpy(&wl->bssid, &e->addr, ETHER_ADDR_LEN);
 	wl_update_bss_info(wl);
+
+	wdev = ndev->ieee80211_ptr;
+	bss = cfg80211_get_bss(
+			wdev->wiphy, &wl->conf->channel, (u8 *)&wl->bssid, wdev->ssid,
+			wdev->ssid_len, WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
+
+	if (!bss) {
+		WL_ERR(("bss is null.\n"));
+		clear_bit(WL_STATUS_CONNECTED, &wl->status);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+    cfg80211_disconnected(ndev, 0, NULL, 0, GFP_KERNEL);
+#else
+    cfg80211_disconnected(ndev, 0, NULL, 0, false, GFP_KERNEL);
+#endif
+		return -1;
+	}
+
 	cfg80211_roamed(ndev,
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 39)
 			&wl->conf->channel,
@@ -2893,6 +2917,10 @@

 s32 wl_cfg80211_up(struct net_device *ndev)
 {
+	s32 roam_scan_period;
+	s32 roam_trigger[2];
+	s32 roam_delta[2];
+
 	struct wl_cfg80211_priv *wl = ndev_to_wl(ndev);
 	s32 err = 0;
 	struct wireless_dev *wdev = ndev->ieee80211_ptr;
@@ -2904,6 +2932,24 @@
 	}

 	wl_update_wowl(ndev);
+
+	// Disable roaming practically by using non-sense values.
+	roam_scan_period = 86400;
+	roam_trigger[0] = -99;
+	roam_trigger[1] = 3; // WLC_BAND_2G | WLC_BAND_5G;
+	roam_delta[0] = 99;
+	roam_delta[1] = 3; // WLC_BAND_2G | WLC_BAND_5G;
+
+	if (wl_dev_ioctl(ndev, WLC_SET_ROAM_SCAN_PERIOD, &roam_scan_period, sizeof(roam_scan_period)) < 0) {
+		WL_ERR(("Failed to set roam scan period\n"));
+	}
+	if (wl_dev_ioctl(ndev, WLC_SET_ROAM_DELTA, roam_delta, sizeof(roam_delta)) < 0) {
+		WL_ERR(("Failed to set roam delta\n"));
+	}
+	if (wl_dev_ioctl(ndev, WLC_SET_ROAM_TRIGGER, roam_trigger, sizeof(roam_trigger)) < 0) {
+		WL_ERR(("Failed to set roam trigger\n"));
+	}
+
 	return 0;
 }