mac80211: remove IEEE80211_HW_SCAN_WHILE_IDLE

There are only a few drivers that use HW scan, and
all of those don't need a non-idle transition before
starting the scan -- some don't even care about idle
at all. Remove the flag and code associated with it.

The only driver that really actually needed this is
wl1251 and it can just do it itself in the hw_scan
callback -- implement that.

Acked-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

5 files changed, 25 insertions, 10 deletions

diff --git a/drivers/net/wireless/iwlwifi/dvm/mac80211.c b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
index 75f6f6cfdd4..0fccf725a2e 100644
--- a/drivers/net/wireless/iwlwifi/dvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
@@ -151,8 +151,7 @@ int iwlagn_mac_setup_register(struct iwl_priv *priv,
 		    IEEE80211_HW_QUEUE_CONTROL |
 		    IEEE80211_HW_SUPPORTS_PS |
 		    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
-		    IEEE80211_HW_WANT_MONITOR_VIF |
-		    IEEE80211_HW_SCAN_WHILE_IDLE;
+		    IEEE80211_HW_WANT_MONITOR_VIF;
 
 	hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 	hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index ce6127caabd..bbb8a5b3566 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -113,7 +113,6 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 		    IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 		    IEEE80211_HW_QUEUE_CONTROL |
 		    IEEE80211_HW_WANT_MONITOR_VIF |
-		    IEEE80211_HW_SCAN_WHILE_IDLE |
 		    IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
 		    IEEE80211_HW_SUPPORTS_PS |
 		    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
diff --git a/drivers/net/wireless/ti/wl1251/event.c b/drivers/net/wireless/ti/wl1251/event.c
index 5ec50a476a6..74ae8e1c2e3 100644
--- a/drivers/net/wireless/ti/wl1251/event.c
+++ b/drivers/net/wireless/ti/wl1251/event.c
@@ -29,6 +29,8 @@
 static int wl1251_event_scan_complete(struct wl1251 *wl,
 				      struct event_mailbox *mbox)
 {
+	int ret = 0;
+
 	wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
 		     mbox->scheduled_scan_status,
 		     mbox->scheduled_scan_channels);
@@ -37,9 +39,11 @@ static int wl1251_event_scan_complete(struct wl1251 *wl,
 		ieee80211_scan_completed(wl->hw, false);
 		wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
 		wl->scanning = false;
+		if (wl->hw->conf.flags & IEEE80211_CONF_IDLE)
+			ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 	}
 
-	return 0;
+	return ret;
 }
 
 static void wl1251_event_mbox_dump(struct event_mailbox *mbox)
diff --git a/drivers/net/wireless/ti/wl1251/main.c b/drivers/net/wireless/ti/wl1251/main.c
index f47e8b0482a..bbbf68cf50a 100644
--- a/drivers/net/wireless/ti/wl1251/main.c
+++ b/drivers/net/wireless/ti/wl1251/main.c
@@ -623,7 +623,7 @@ static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 		}
 	}
 
-	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
+	if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
 		if (conf->flags & IEEE80211_CONF_IDLE) {
 			ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 			if (ret < 0)
@@ -895,11 +895,21 @@ static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 	if (ret < 0)
 		goto out;
 
+	if (hw->conf.flags & IEEE80211_CONF_IDLE) {
+		ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
+		if (ret < 0)
+			goto out_sleep;
+		ret = wl1251_join(wl, wl->bss_type, wl->channel,
+				  wl->beacon_int, wl->dtim_period);
+		if (ret < 0)
+			goto out_sleep;
+	}
+
 	skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
 				     req->ie_len);
 	if (!skb) {
 		ret = -ENOMEM;
-		goto out;
+		goto out_idle;
 	}
 	if (req->ie_len)
 		memcpy(skb_put(skb, req->ie_len), req->ie, req->ie_len);
@@ -908,11 +918,11 @@ static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 				      skb->len);
 	dev_kfree_skb(skb);
 	if (ret < 0)
-		goto out_sleep;
+		goto out_idle;
 
 	ret = wl1251_cmd_trigger_scan_to(wl, 0);
 	if (ret < 0)
-		goto out_sleep;
+		goto out_idle;
 
 	wl->scanning = true;
 
@@ -920,9 +930,13 @@ static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 			      req->n_channels, WL1251_SCAN_NUM_PROBES);
 	if (ret < 0) {
 		wl->scanning = false;
-		goto out_sleep;
+		goto out_idle;
 	}
+	goto out_sleep;
 
+out_idle:
+	if (hw->conf.flags & IEEE80211_CONF_IDLE)
+		ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 out_sleep:
 	wl1251_ps_elp_sleep(wl);
 
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index 28a37576d56..2c2ff3e1f84 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -5636,7 +5636,6 @@ static int wl1271_init_ieee80211(struct wl1271 *wl)
 		IEEE80211_HW_AP_LINK_PS |
 		IEEE80211_HW_AMPDU_AGGREGATION |
 		IEEE80211_HW_TX_AMPDU_SETUP_IN_HW |
-		IEEE80211_HW_SCAN_WHILE_IDLE |
 		IEEE80211_HW_QUEUE_CONTROL;
 
 	wl->hw->wiphy->cipher_suites = cipher_suites;