Hi,
On Fri, Aug 15, 2014 at 07:42:31PM +0200, Sebastian Andrzej Siewior wrote:
> --- a/drivers/tty/serial/8250/8250_core.c
> +++ b/drivers/tty/serial/8250/8250_core.c
> @@ -1899,12 +1984,22 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits)
>
> static int serial8250_get_poll_char(struct uart_port *port)
> {
> - unsigned char lsr = serial_port_in(port, UART_LSR);
> + unsigned char lsr;
> + int status;
> +
> + serial8250_rpm_get(up);
or up won't be defined below. You probably need
+ struct uart_8250_port *up = up_to_u8250p(port);
somewhere in there.
> - if (!(lsr & UART_LSR_DR))
> - return NO_POLL_CHAR;
> + lsr = serial_port_in(port, UART_LSR);
>
> - return serial_port_in(port, UART_RX);
> + if (!(lsr & UART_LSR_DR)) {
> + status = NO_POLL_CHAR;
> + goto out;
> + }
> +
> + status = serial_port_in(port, UART_RX);
> +out:
> + serial8250_rpm_put(up);
> + return status;
> }
Cheers,
Frans
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