fix: use redis over ssh channel(#2057) (#2060)

Author: slowrookie

internal/pool/conn.go

@@ -64,17 +64,21 @@ func (cn *Conn) RemoteAddr() net.Addr {
 }
 
 func (cn *Conn) WithReader(ctx context.Context, timeout time.Duration, fn func(rd *proto.Reader) error) error {
-	if err := cn.netConn.SetReadDeadline(cn.deadline(ctx, timeout)); err != nil {
-		return err
+	if timeout != 0 {
+		if err := cn.netConn.SetReadDeadline(cn.deadline(ctx, timeout)); err != nil {
+			return err
+		}
 	}
 	return fn(cn.rd)
 }
 
 func (cn *Conn) WithWriter(
 	ctx context.Context, timeout time.Duration, fn func(wr *proto.Writer) error,
 ) error {
-	if err := cn.netConn.SetWriteDeadline(cn.deadline(ctx, timeout)); err != nil {
-		return err
+	if timeout != 0 {
+		if err := cn.netConn.SetWriteDeadline(cn.deadline(ctx, timeout)); err != nil {
+			return err
+		}
 	}
 
 	if cn.bw.Buffered() > 0 {