wifi: iwlwifi: mvm: modify link instead of removing it during csa

During CSA the PHY used by the link is changing, So the driver
needs to modify the links phy to the FW. Currently the driver is doing
it by removing the link and adding a new one with the new phy_id, but the
FW expects the link only to be modified. Fix this by modifying the links
phy_id instead of removing it and adding a new one
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230328104948.c07ca7aace29.I4ed5c77f4afe1b5da19322734e2f84d51aa541ad@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c

@@ -157,9 +157,16 @@ static int __iwl_mvm_mld_assign_vif_chanctx(struct iwl_mvm *mvm,
 						switching_chanctx, &ret))
 		goto out;
 
-	ret = iwl_mvm_add_link(mvm, vif);
-	if (ret)
-		goto out;
+	if (!switching_chanctx) {
+		ret = iwl_mvm_add_link(mvm, vif);
+		if (ret)
+			goto out;
+	} else {
+		ret = iwl_mvm_link_changed(mvm, vif, 0, false);
+		if (ret)
+			goto out_remove_link;
+	}
+
 	ret = iwl_mvm_link_changed(mvm, vif, LINK_CONTEXT_MODIFY_ACTIVE |
 				   LINK_CONTEXT_MODIFY_RATES_INFO,
 				   true);
@@ -219,10 +226,9 @@ static void __iwl_mvm_mld_unassign_vif_chanctx(struct iwl_mvm *mvm,
 	if (vif->type == NL80211_IFTYPE_MONITOR)
 		iwl_mvm_mld_rm_snif_sta(mvm, vif);
 
-	/* Link needs to be deactivated before removal */
 	iwl_mvm_link_changed(mvm, vif, LINK_CONTEXT_MODIFY_ACTIVE, false);
-	iwl_mvm_remove_link(mvm, vif);
-
+	if (!switching_chanctx)
+		iwl_mvm_remove_link(mvm, vif);
 out:
 	if (switching_chanctx)
 		return;