From: Hante Meuleman <meuleman@broadcom.com>
Date: Thu, 8 Oct 2015 20:33:21 +0200
Subject: [PATCH] brcmfmac: Properly set carrier state of netdev.

Use the netif_carrier api to correctly set carrier state on the
different modes.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---

--- a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
@@ -4250,6 +4250,7 @@ brcmf_cfg80211_start_ap(struct wiphy *wi
 		brcmf_dbg(TRACE, "GO mode configuration complete\n");
 	}
 	set_bit(BRCMF_VIF_STATUS_AP_CREATED, &ifp->vif->sme_state);
+	brcmf_net_setcarrier(ifp, true);
 
 exit:
 	if ((err) && (!mbss)) {
@@ -4314,6 +4315,7 @@ static int brcmf_cfg80211_stop_ap(struct
 	brcmf_set_mpc(ifp, 1);
 	brcmf_configure_arp_offload(ifp, true);
 	clear_bit(BRCMF_VIF_STATUS_AP_CREATED, &ifp->vif->sme_state);
+	brcmf_net_setcarrier(ifp, false);
 
 	return err;
 }
@@ -5023,6 +5025,7 @@ brcmf_notify_connect_status(struct brcmf
 				&ifp->vif->sme_state);
 		} else
 			brcmf_bss_connect_done(cfg, ndev, e, true);
+		brcmf_net_setcarrier(ifp, true);
 	} else if (brcmf_is_linkdown(e)) {
 		brcmf_dbg(CONN, "Linkdown\n");
 		if (!brcmf_is_ibssmode(ifp->vif)) {
@@ -5032,6 +5035,7 @@ brcmf_notify_connect_status(struct brcmf
 		brcmf_init_prof(ndev_to_prof(ndev));
 		if (ndev != cfg_to_ndev(cfg))
 			complete(&cfg->vif_disabled);
+		brcmf_net_setcarrier(ifp, false);
 	} else if (brcmf_is_nonetwork(cfg, e)) {
 		if (brcmf_is_ibssmode(ifp->vif))
 			clear_bit(BRCMF_VIF_STATUS_CONNECTING,
--- a/drivers/net/wireless/brcm80211/brcmfmac/core.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/core.c
@@ -635,8 +635,7 @@ static int brcmf_netdev_stop(struct net_
 
 	brcmf_cfg80211_down(ndev);
 
-	/* Set state and stop OS transmissions */
-	netif_stop_queue(ndev);
+	brcmf_net_setcarrier(ifp, false);
 
 	return 0;
 }
@@ -670,8 +669,8 @@ static int brcmf_netdev_open(struct net_
 		return -EIO;
 	}
 
-	/* Allow transmit calls */
-	netif_start_queue(ndev);
+	/* Clear, carrier, set when connected or AP mode. */
+	netif_carrier_off(ndev);
 	return 0;
 }
 
@@ -736,6 +735,24 @@ static void brcmf_net_detach(struct net_
 		brcmf_cfg80211_free_netdev(ndev);
 }
 
+void brcmf_net_setcarrier(struct brcmf_if *ifp, bool on)
+{
+	struct net_device *ndev;
+
+	brcmf_dbg(TRACE, "Enter, idx=%d carrier=%d\n", ifp->bssidx, on);
+
+	ndev = ifp->ndev;
+	brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_DISCONNECTED, !on);
+	if (on) {
+		if (!netif_carrier_ok(ndev))
+			netif_carrier_on(ndev);
+
+	} else {
+		if (netif_carrier_ok(ndev))
+			netif_carrier_off(ndev);
+	}
+}
+
 static int brcmf_net_p2p_open(struct net_device *ndev)
 {
 	brcmf_dbg(TRACE, "Enter\n");
--- a/drivers/net/wireless/brcm80211/brcmfmac/core.h
+++ b/drivers/net/wireless/brcm80211/brcmfmac/core.h
@@ -154,10 +154,13 @@ struct brcmf_fws_mac_descriptor;
  *	netif stopped due to firmware signalling flow control.
  * @BRCMF_NETIF_STOP_REASON_FLOW:
  *	netif stopped due to flowring full.
+ * @BRCMF_NETIF_STOP_REASON_DISCONNECTED:
+ *	netif stopped due to not being connected (STA mode).
  */
 enum brcmf_netif_stop_reason {
-	BRCMF_NETIF_STOP_REASON_FWS_FC = 1,
-	BRCMF_NETIF_STOP_REASON_FLOW = 2
+	BRCMF_NETIF_STOP_REASON_FWS_FC = BIT(0),
+	BRCMF_NETIF_STOP_REASON_FLOW = BIT(1),
+	BRCMF_NETIF_STOP_REASON_DISCONNECTED = BIT(2)
 };
 
 /**
@@ -213,5 +216,6 @@ void brcmf_txflowblock_if(struct brcmf_i
 			  enum brcmf_netif_stop_reason reason, bool state);
 void brcmf_txfinalize(struct brcmf_if *ifp, struct sk_buff *txp, bool success);
 void brcmf_netif_rx(struct brcmf_if *ifp, struct sk_buff *skb);
+void brcmf_net_setcarrier(struct brcmf_if *ifp, bool on);
 
 #endif /* BRCMFMAC_CORE_H */