From: Sonic Zhang <sonic.zhang@xxxxxxxxxx> set_termios may be invoked before the former data transfer is completed. Block until the tranfer is done. Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx> --- drivers/tty/serial/bfin_uart.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index 9242d56..71c0c09 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -869,6 +869,10 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15); + /* Wait till the transfer buffer is empty */ + while (UART_GET_GCTL(uart) & UCEN && !(UART_GET_LSR(uart) & TEMT)) + barrier(); + /* Disable UART */ ier = UART_GET_IER(uart); UART_PUT_GCTL(uart, UART_GET_GCTL(uart) & ~UCEN); -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
