vets and comments

backoff.go

@@ -44,7 +44,7 @@ type BackoffConfig struct {
 }
 
 // ConnectParams defines the parameters for connecting and retrying. Users are
-// encouraged to use this instead of BackoffConfig the type defined above. See
+// encouraged to use this instead of the BackoffConfig type defined above. See
 // here for more details:
 // https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
 //

backoff/backoff.go

@@ -39,7 +39,7 @@ type Config struct {
 }
 
 // DefaultConfig is a backoff configuration with the default values specfied
-// in https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+// at https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
 //
 // This should be useful for callers who want to configure backoff with
 // non-default values only for a subset of the options.

resolver/dns/dns_resolver.go

@@ -131,7 +131,7 @@ func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts
 	bc.MaxDelay = b.minFreq
 	d := &dnsResolver{
 		freq:                 b.minFreq,
-		backoff:              backoff.Exponential{bc},
+		backoff:              backoff.Exponential{Config: bc},
 		host:                 host,
 		port:                 port,
 		ctx:                  ctx,