Blackfin Serial Driver: Fix bug - kernel hangs when accessing uart 0 on bf537 when...

Wait only when this UART is enabled.
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3995

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index b773764ddab97d4016ab8d31ff833eae58d8b4e9..1dc9b583fa62e4a2aa49df54a655d4f053bfcbb3 100644 (file)
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -806,10 +806,6 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
 
        UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15);
 
-       do {
-               lsr = UART_GET_LSR(uart);
-       } while (!(lsr & TEMT));
-
        /* Disable UART */
        ier = UART_GET_IER(uart);
 #ifdef CONFIG_BF54x