lkml.org 
[lkml]   [2012]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[ 69/70] pch_uart: Fix rx error interrupt setting issue
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tomoya MORINAGA <tomoya.rohm@gmail.com>

commit 9539dfb7ac1c84522fe1f79bb7dac2990f3de44a upstream.

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>
[Backported by Tomoya MORINGA: adjusted context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/tty/serial/pch_uart.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index c5bc23d..2cc9b46 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);
priv->int_dis_flag = 1;
}

@@ -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;



\
 
 \ /
  Last update: 2012-08-07 06:21    [W:0.235 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site