brcmfmac: ignore 11d configuration errors

802.11d is not always supported by firmware anymore. Currently the
AP configuration of 11d will cause an abort if the ioctl set is
failing. This behavior is not correct and the error should be
ignored.

Reviewed-by: Arend Van Spriel <arend.vanspriel@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Signed-off-by: Hante Meuleman <hante.meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 748eaa6..0f2667e 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -4502,6 +4502,7 @@
 	u16 chanspec = chandef_to_chanspec(&cfg->d11inf, &settings->chandef);
 	bool mbss;
 	int is_11d;
+	bool supports_11d;
 
 	brcmf_dbg(TRACE, "ctrlchn=%d, center=%d, bw=%d, beacon_interval=%d, dtim_period=%d,\n",
 		  settings->chandef.chan->hw_value,
@@ -4514,11 +4515,16 @@
 	mbss = ifp->vif->mbss;
 
 	/* store current 11d setting */
-	brcmf_fil_cmd_int_get(ifp, BRCMF_C_GET_REGULATORY, &ifp->vif->is_11d);
-	country_ie = brcmf_parse_tlvs((u8 *)settings->beacon.tail,
-				      settings->beacon.tail_len,
-				      WLAN_EID_COUNTRY);
-	is_11d = country_ie ? 1 : 0;
+	if (brcmf_fil_cmd_int_get(ifp, BRCMF_C_GET_REGULATORY,
+				  &ifp->vif->is_11d)) {
+		supports_11d = false;
+	} else {
+		country_ie = brcmf_parse_tlvs((u8 *)settings->beacon.tail,
+					      settings->beacon.tail_len,
+					      WLAN_EID_COUNTRY);
+		is_11d = country_ie ? 1 : 0;
+		supports_11d = true;
+	}
 
 	memset(&ssid_le, 0, sizeof(ssid_le));
 	if (settings->ssid == NULL || settings->ssid_len == 0) {
@@ -4577,7 +4583,7 @@
 
 	/* Parameters shared by all radio interfaces */
 	if (!mbss) {
-		if (is_11d != ifp->vif->is_11d) {
+		if ((supports_11d) && (is_11d != ifp->vif->is_11d)) {
 			err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_REGULATORY,
 						    is_11d);
 			if (err < 0) {
@@ -4619,7 +4625,7 @@
 			brcmf_err("SET INFRA error %d\n", err);
 			goto exit;
 		}
-	} else if (WARN_ON(is_11d != ifp->vif->is_11d)) {
+	} else if (WARN_ON(supports_11d && (is_11d != ifp->vif->is_11d))) {
 		/* Multiple-BSS should use same 11d configuration */
 		err = -EINVAL;
 		goto exit;
@@ -4753,11 +4759,8 @@
 			brcmf_err("setting INFRA mode failed %d\n", err);
 		if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_MBSS))
 			brcmf_fil_iovar_int_set(ifp, "mbss", 0);
-		err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_REGULATORY,
-					    ifp->vif->is_11d);
-		if (err < 0)
-			brcmf_err("restoring REGULATORY setting failed %d\n",
-				  err);
+		brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_REGULATORY,
+				      ifp->vif->is_11d);
 		/* Bring device back up so it can be used again */
 		err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
 		if (err < 0)