rk_serial:1.fix bug dma buffer free error

diff --git a/drivers/tty/serial/rk_serial.c b/drivers/tty/serial/rk_serial.c
index 3157ce2f1e47e99a87bb436bca81ed79378ec17c..1818c45e02ba6a157530b01a41900f0bc4a0c705 100644 (file)
--- a/drivers/tty/serial/rk_serial.c
+++ b/drivers/tty/serial/rk_serial.c
@@ -64,8 +64,10 @@
 *v1.3 : 2012-12-14\r
 *              1. When enable Programmable THRE Interrupt Mode, in lsr register, only UART_LSR_TEMT means transmit empty, but\r
                 UART_LSR_THRE doesn't. So, the macro BOTH_EMPTY should be replaced with UART_LSR_TEMT.\r
+*v1.4 : 2013-04-16\r
+*              1.fix bug dma buffer free error\r
 */\r
-#define VERSION_AND_TIME  "rk_serial.c v1.3 2012-12-14"\r
+#define VERSION_AND_TIME  "rk_serial.c v1.4 2013-04-16"\r
 \r
 #define PORT_RK                90\r
 #define UART_USR       0x1F    /* UART Status Register */\r
@@ -1349,8 +1351,8 @@ static void serial_rk_shutdown(struct uart_port *port)
         */\r
        (void) serial_in(up, UART_RX);\r
 #if USE_DMA\r
-       //if (up->dma->use_dma & TX_DMA)\r
-       //      up->port.state->xmit.buf = NULL;\r
+       if (up->dma->use_dma & TX_DMA)\r
+               up->port.state->xmit.buf = NULL;\r
 #endif\r
        free_irq(up->port.irq, up);\r
        clk_disable(up->clk);\r