pch_uart: Fix rx error interrupt setting issue

Rx Error interrupt(E.G. parity error) is not enabled.
So, when parity error occurs, error interrupt is not occurred.
As a result, the received data is not dropped.

This patch adds enable/disable rx error interrupt code.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 12 insertions, 6 deletions

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index c5bc23d6ade9..2cc9b4694625 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -757,7 +757,8 @@ static void pch_dma_rx_complete(void *arg)
                 tty_flip_buffer_push(tty);
         tty_kref_put(tty);
         async_tx_ack(priv->desc_rx);
-        pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT);
+        pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT |
+                                            PCH_UART_HAL_RX_ERR_INT);
 }
 
 static void pch_dma_tx_complete(void *arg)
@@ -812,7 +813,8 @@ static int handle_rx_to(struct eg20t_port *priv)
         int rx_size;
         int ret;
         if (!priv->start_rx) {
-                pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT);
+                pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT |
+                                                     PCH_UART_HAL_RX_ERR_INT);
                 return 0;
         }
         buf = &priv->rxbuf;
@@ -1081,11 +1083,13 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
                 case PCH_UART_IID_RDR:  /* Received Data Ready */
                         if (priv->use_dma) {
                                 pch_uart_hal_disable_interrupt(priv,
-                                                        PCH_UART_HAL_RX_INT);
+                                                PCH_UART_HAL_RX_INT |
+                                                PCH_UART_HAL_RX_ERR_INT);
                                 ret = dma_handle_rx(priv);
                                 if (!ret)
                                         pch_uart_hal_enable_interrupt(priv,
-                                                        PCH_UART_HAL_RX_INT);
+                                                PCH_UART_HAL_RX_INT |
+                                                PCH_UART_HAL_RX_ERR_INT);
                         } else {
                                 ret = handle_rx(priv);
                         }
@@ -1211,7 +1215,8 @@ static void pch_uart_stop_rx(struct uart_port *port)
         struct eg20t_port *priv;
         priv = container_of(port, struct eg20t_port, port);
         priv->start_rx = 0;
-        pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT);
+        pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT |
+                                             PCH_UART_HAL_RX_ERR_INT);
 }
 
 /* Enable the modem status interrupts. */
@@ -1304,7 +1309,8 @@ static int pch_uart_startup(struct uart_port *port)
                 pch_request_dma(port);
 
         priv->start_rx = 1;
-        pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT);
+        pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT |
+                                            PCH_UART_HAL_RX_ERR_INT);
         uart_update_timeout(port, CS8, default_baud);
 
         return 0;