From: Sonic Zhang <sonic.zh...@analog.com>
set_termios may be invoked before the former data transfer is completed. Block
until the
tranfer is done.
Signed-off-by: Sonic Zhang <sonic.zh...@analog.com>
---
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
_______________________________________________
Uclinux-dist-devel mailing list
Uclinux-dist-devel@blackfin.uclinux.org
https://blackfin.uclinux.org/mailman/listinfo/uclinux-dist-devel
