From 5ffdeea2f99ed9d46bf954c9fdc64da7da57e81b Mon Sep 17 00:00:00 2001
From: Sonic Zhang <sonic.zhang@analog.com>
Date: Mon, 13 Oct 2008 10:33:33 +0100
Subject: [PATCH] Blackfin Serial Driver: Fix bug - Don't call tx_stop in
 tx_transfer.

Disable irq and return immediately.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/serial/bfin_5xx.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 8d2d75706685..5e20f50342a9 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -301,7 +301,11 @@ static void bfin_serial_tx_chars(struct bfin_serial_port *uart)
 	bfin_serial_mctrl_check(uart);
 
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) {
-		bfin_serial_stop_tx(&uart->port);
+#ifdef CONFIG_BF54x
+		/* Clear TFI bit */
+		UART_PUT_LSR(uart, TFI);
+#endif
+		UART_CLEAR_IER(uart, ETBEI);
 		return;
 	}
 
-- 
2.20.1