wifi: iwlwifi: mvm: consider having one active link

Do not call iwl_mvm_mld_get_primary_link if only one link
is active.
In that case, the sole active link should be used.

iwl_mvm_mld_get_primary_link returns -1 if only one link
is active causing a warning.

Fixes: 8c9bef2 ("wifi: iwlwifi: mvm: d3: implement suspend with MLO")
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240311081938.6c50061bf69b.I05b0ac7fa7149eabaa5570a6f65b0d9bfb09a6f1@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Author: striebit

drivers/net/wireless/intel/iwlwifi/mvm/d3.c

@@ -1260,15 +1260,15 @@ static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 	if (IS_ERR_OR_NULL(vif))
 		return 1;
 
-	if (ieee80211_vif_is_mld(vif) && vif->cfg.assoc) {
+	if (hweight16(vif->active_links) > 1) {
 		/*
-		 * Select the 'best' link. May need to revisit, it seems
-		 * better to not optimize for throughput but rather range,
-		 * reliability and power here - and select 2.4 GHz ...
+		 * Select the 'best' link.
+		 * May need to revisit, it seems better to not optimize
+		 * for throughput but rather range, reliability and
+		 * power here - and select 2.4 GHz ...
 		 */
-		primary_link =
-			iwl_mvm_mld_get_primary_link(mvm, vif,
-						     vif->active_links);
+		primary_link = iwl_mvm_mld_get_primary_link(mvm, vif,
+							    vif->active_links);
 
 		if (WARN_ONCE(primary_link < 0, "no primary link in 0x%x\n",
 			      vif->active_links))
@@ -1277,6 +1277,8 @@ static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 		ret = ieee80211_set_active_links(vif, BIT(primary_link));
 		if (ret)
 			return ret;
+	} else if (vif->active_links) {
+		primary_link = __ffs(vif->active_links);
 	} else {
 		primary_link = 0;
 	}