serial: mxs: remove the MXS_AUART_DMA_CONFIG

The MXS_AUART_DMA_CONFIG is originally used to check if the DT node
is configured with the DMA property.

But now, the MXS_AUART_DMA_CONFIG is set unconditionally in the
serial_mxs_probe_dt(), so the check in the mxs_auart_settermios() is
not necessary anymore. This patch removes this macro.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index eac7b585bc0c..10e9d70b5c40 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -133,7 +133,6 @@ enum mxs_auart_type {
 struct mxs_auart_port {
         struct uart_port port;
 
-#define MXS_AUART_DMA_CONFIG    0x1
 #define MXS_AUART_DMA_ENABLED   0x2
 #define MXS_AUART_DMA_TX_SYNC   2  /* bit 2 */
 #define MXS_AUART_DMA_RX_READY  3  /* bit 3 */
@@ -640,7 +639,7 @@ static void mxs_auart_settermios(struct uart_port *u,
                  * we can only implement the DMA support for auart
                  * in mx28.
                  */
-                if (is_imx28_auart(s) && (s->flags & MXS_AUART_DMA_CONFIG)
+                if (is_imx28_auart(s)
                                 && test_bit(MXS_AUART_RTSCTS, &s->flags)) {
                         if (!mxs_auart_dma_init(s))
                                 /* enable DMA tranfer */
@@ -1009,8 +1008,6 @@ static int serial_mxs_probe_dt(struct mxs_auart_port *s,
         }
         s->port.line = ret;
 
-        s->flags |= MXS_AUART_DMA_CONFIG;
-
         if (of_get_property(np, "fsl,uart-has-rtscts", NULL))
                 set_bit(MXS_AUART_RTSCTS, &s->flags);