linux-kernel - [PATCH 11/76] Blackfin Serial Driver: Fix bug

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Message-ID: <20081005160600.1997.67814.stgit@localhost.localdomain>
Date:	Sun, 05 Oct 2008 17:06:02 +0100
From:	Alan Cox <alan@...hat.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH 11/76] Blackfin Serial Driver: Fix bug - Don't call tx_stop in
	tx_transfer.

From: Sonic Zhang <sonic.zhang@...log.com>

Disable irq and return immediately.

Signed-off-by: Sonic Zhang <sonic.zhang@...log.com>
Signed-off-by: Bryan Wu <cooloney@...nel.org>
Signed-off-by: Alan Cox <alan@...hat.com>
---

 drivers/serial/bfin_5xx.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 8d2d757..5e20f50 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;
 	}
 

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