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Subject[PATCH 6/8] Blackfin Serial Driver: Fix bug - Don't call tx_stop in tx_transfer.
Date
From: Sonic Zhang <sonic.zhang@analog.com>

Disable irq and return immediately.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---
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 31fc8e1..afeff9f 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;
}

--
1.5.6


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