C++编译错误: request for member ‘c_cflag' in something not a structure or union

Question

我尝试在 Debian 7 上编译 cp210x USB-UART 驱动程序并收到以下错误(当 make 命令时):

/var/distr/sillabs/Linux_3.x.x_VCP_Driver_Source/cp210x.c:589:17: error: request for member ‘c_cflag’ in something not a structure or union

这是代码片段，第 589 行(以 &tty-> 开头)，cp210x.c:

static void cp210x_get_termios(struct tty_struct *tty,
        struct usb_serial_port *port)
{
        unsigned int baud;
        if (tty) {
                cp210x_get_termios_port(tty->driver_data,
                        &tty->termios.c_cflag, &baud);
                tty_encode_baud_rate(tty, baud, baud);
        } else {
                unsigned int cflag;
                cflag = 0;
                cp210x_get_termios_port(port, &cflag, &baud);
        }
}

我认为 &tty->termios.c_cflag 结构有问题。请帮忙如何解决？

谢谢!

Answer 1

这意味着在你的tty_struct定义中，termios是一个结构体指针，而不是一个结构体。您需要更改表达式

&tty->termios.c_cflag

至

&tty->termios->c_cflag