serial: bfin_5xx: IRDA is not affected by anomaly 05000230

Anomaly 05000230 (over sampling of the UART STOP bit) applies only when
the peripheral is operating in UART mode.  So drop the anomaly handling
when the UART is in IRDA mode.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 96f7e7484fee..a78652b21e40 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -869,7 +869,12 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
         }
 
         baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
-        quot = uart_get_divisor(port, baud) - ANOMALY_05000230;
+        quot = uart_get_divisor(port, baud);
+
+        /* If discipline is not IRDA, apply ANOMALY_05000230 */
+        if (termios->c_line != N_IRDA)
+                quot -= ANOMALY_05000230;
+
         spin_lock_irqsave(&uart->port.lock, flags);
 
         UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15);