iwlwifi: mvm: assign quota per virtual interface

Instead of assigning quota per used binding (channel) assign
the same amount of quota for each virtual interface so that
when there are more than two interfaces using more than one
channel, we'll stay on the channels proportionally to the
number of virtual interfaces using the channels.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/iwlwifi/mvm/quota.c

@@ -132,7 +132,7 @@ static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif)
 {
 	struct iwl_time_quota_cmd cmd;
-	int i, idx, ret, num_active_bindings, quota, quota_rem;
+	int i, idx, ret, num_active_macs, quota, quota_rem;
 	struct iwl_mvm_quota_iterator_data data = {
 		.n_interfaces = {},
 		.colors = { -1, -1, -1, -1 },
@@ -162,18 +162,17 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif)
 	 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
 	 * equally between all the bindings that require quota
 	 */
-	num_active_bindings = 0;
+	num_active_macs = 0;
 	for (i = 0; i < MAX_BINDINGS; i++) {
 		cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
-		if (data.n_interfaces[i] > 0)
-			num_active_bindings++;
+		num_active_macs += data.n_interfaces[i];
 	}
 
 	quota = 0;
 	quota_rem = 0;
-	if (num_active_bindings) {
-		quota = IWL_MVM_MAX_QUOTA / num_active_bindings;
-		quota_rem = IWL_MVM_MAX_QUOTA % num_active_bindings;
+	if (num_active_macs) {
+		quota = IWL_MVM_MAX_QUOTA / num_active_macs;
+		quota_rem = IWL_MVM_MAX_QUOTA % num_active_macs;
 	}
 
 	for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
@@ -187,7 +186,8 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif)
 			cmd.quotas[idx].quota = cpu_to_le32(0);
 			cmd.quotas[idx].max_duration = cpu_to_le32(0);
 		} else {
-			cmd.quotas[idx].quota = cpu_to_le32(quota);
+			cmd.quotas[idx].quota =
+				cpu_to_le32(quota * data.n_interfaces[i]);
 			cmd.quotas[idx].max_duration =
 				cpu_to_le32(IWL_MVM_MAX_QUOTA);
 		}