Remove acquiring read-lock twice (#119)

Closes #118.

Author: orientlu

cmd/lora-gateway-bridge/cmd/root.go

@@ -32,6 +32,8 @@ func init() {
 	rootCmd.PersistentFlags().StringVarP(&cfgFile, "config", "c", "", "path to configuration file (optional)")
 	rootCmd.PersistentFlags().Int("log-level", 4, "debug=5, info=4, error=2, fatal=1, panic=0")
 
+	viper.BindPFlag("general.log_level", rootCmd.PersistentFlags().Lookup("log-level"))
+
 	// default values
 	viper.SetDefault("general.log_level", 4)
 	viper.SetDefault("backend.type", "semtech_udp")

internal/backend/semtechudp/backend.go

@@ -465,8 +465,6 @@ func (b *Backend) handlePushData(up udpPacket) error {
 
 func (b *Backend) handleStats(gatewayID lorawan.EUI64, stats gw.GatewayStats) {
 	// set configuration version, if available
-	b.RLock()
-	defer b.RUnlock()
 
 	for _, c := range b.configurations {
 		if gatewayID == c.gatewayID {