wlcore: reconfigure sleep_auth when removing interfaces

The sleep_auth value of the last interface to be set up prevailed when
an interface was removed. Take care of this by correctly configuring the
value according to the remaining STA/AP interfaces.

Take this opportunity to refactor the sleep_auth setting code for better
readability.

[Small style fix. -- Luca]
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/ti/wlcore/acx.c

@@ -81,8 +81,11 @@ int wl1271_acx_sleep_auth(struct wl1271 *wl, u8 sleep_auth)
 	auth->sleep_auth = sleep_auth;
 
 	ret = wl1271_cmd_configure(wl, ACX_SLEEP_AUTH, auth, sizeof(*auth));
-	if (ret < 0)
+	if (ret < 0) {
+		wl1271_error("could not configure sleep_auth to %d: %d",
+			     sleep_auth, ret);
 		goto out;
+	}
 
 	wl->sleep_auth = sleep_auth;
 out:

drivers/net/wireless/ti/wlcore/init.c

@@ -554,36 +554,29 @@ int wl1271_init_vif_specific(struct wl1271 *wl, struct ieee80211_vif *vif)
 	bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
 	int ret, i;
 
-	/*
-	 * consider all existing roles before configuring psm.
-	 * TODO: reconfigure on interface removal.
-	 */
-	if (!wl->ap_count) {
-		if (is_ap) {
+	/* consider all existing roles before configuring psm. */
+
+	if (wl->ap_count == 0 && is_ap) { /* first AP */
 		/* Configure for power always on */
 		ret = wl1271_acx_sleep_auth(wl, WL1271_PSM_CAM);
 		if (ret < 0)
 			return ret;
-		} else if (!wl->sta_count) {
+	/* first STA, no APs */
+	} else if (wl->sta_count == 0 && wl->ap_count == 0 && !is_ap) {
 		u8 sta_auth = wl->conf.conn.sta_sleep_auth;
-			if (sta_auth != WL1271_PSM_ILLEGAL) {
 		/* Configure for power according to debugfs */
+		if (sta_auth != WL1271_PSM_ILLEGAL)
 			ret = wl1271_acx_sleep_auth(wl, sta_auth);
-				if (ret < 0)
-					return ret;
-			} else if (wl->quirks & WLCORE_QUIRK_NO_ELP) {
 		/* Configure for power always on */
+		else if (wl->quirks & WLCORE_QUIRK_NO_ELP)
 			ret = wl1271_acx_sleep_auth(wl, WL1271_PSM_CAM);
-				if (ret < 0)
-					return ret;
-			} else {
 		/* Configure for ELP power saving */
+		else
 			ret = wl1271_acx_sleep_auth(wl, WL1271_PSM_ELP);
+
 		if (ret < 0)
 			return ret;
 	}
-		}
-	}
 
 	/* Mode specific init */
 	if (is_ap) {

drivers/net/wireless/ti/wlcore/main.c

@@ -1082,7 +1082,7 @@ int wl1271_plt_stop(struct wl1271 *wl)
 	mutex_lock(&wl->mutex);
 	wl1271_power_off(wl);
 	wl->flags = 0;
-	wl->sleep_auth = WL1271_PSM_CAM;
+	wl->sleep_auth = WL1271_PSM_ILLEGAL;
 	wl->state = WL1271_STATE_OFF;
 	wl->plt = false;
 	wl->rx_counter = 0;
@@ -1741,7 +1741,7 @@ static void wl1271_op_stop(struct ieee80211_hw *hw)
 	wl->ap_fw_ps_map = 0;
 	wl->ap_ps_map = 0;
 	wl->sched_scanning = false;
-	wl->sleep_auth = WL1271_PSM_CAM;
+	wl->sleep_auth = WL1271_PSM_ILLEGAL;
 	memset(wl->roles_map, 0, sizeof(wl->roles_map));
 	memset(wl->links_map, 0, sizeof(wl->links_map));
 	memset(wl->roc_map, 0, sizeof(wl->roc_map));
@@ -2148,6 +2148,7 @@ static void __wl1271_op_remove_interface(struct wl1271 *wl,
 {
 	struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
 	int i, ret;
+	bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
 
 	wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
 
@@ -2228,11 +2229,25 @@ static void __wl1271_op_remove_interface(struct wl1271 *wl,
 	wlvif->role_id = WL12XX_INVALID_ROLE_ID;
 	wlvif->dev_role_id = WL12XX_INVALID_ROLE_ID;
 
-	if (wlvif->bss_type == BSS_TYPE_AP_BSS)
+	if (is_ap)
 		wl->ap_count--;
 	else
 		wl->sta_count--;
 
+	/* Last AP, have more stations. Configure according to STA. */
+	if (wl->ap_count == 0 && is_ap && wl->sta_count) {
+		u8 sta_auth = wl->conf.conn.sta_sleep_auth;
+		/* Configure for power according to debugfs */
+		if (sta_auth != WL1271_PSM_ILLEGAL)
+			wl1271_acx_sleep_auth(wl, sta_auth);
+		/* Configure for power always on */
+		else if (wl->quirks & WLCORE_QUIRK_NO_ELP)
+			wl1271_acx_sleep_auth(wl, WL1271_PSM_CAM);
+		/* Configure for ELP power saving */
+		else
+			wl1271_acx_sleep_auth(wl, WL1271_PSM_ELP);
+	}
+
 	mutex_unlock(&wl->mutex);
 
 	del_timer_sync(&wlvif->rx_streaming_timer);