commit: http://blackfin.uclinux.org/git/?p=linux-kernel;a=commitdiff;h=1638b5962e8e886eb6ce422e265219db45962de9 branch: http://blackfin.uclinux.org/git/?p=linux-kernel;a=shortlog;h=refs/heads/trunk
set_termios may be invoked before the former data transfer is completed. Block until the tranfer is done. Signed-off-by: Sonic Zhang <[email protected]> --- 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 2a541b6..f24e101 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -870,6 +870,10 @@ 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);
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