From: Sonic Zhang <sonic.zhang@analog.com>
Date: Mon, 13 Oct 2008 09:33:33 +0000 (+0100)
Subject: Blackfin Serial Driver: Fix bug - Don't call tx_stop in tx_transfer.
X-Git-Tag: v2.6.28-rc1~682
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=5ffdeea2f99ed9d46bf954c9fdc64da7da57e81b;p=linux-2.6-omap-h63xx.git

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>
---

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 8d2d7570668..5e20f50342a 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;
 	}