[PATCH] serial: ifx6x60: ifx_spi_write don't need to do mrdy_assert when fifo is not empty.

[Jun Chen <jun.d.chen@intel.com>]

This patch check whether the kfifo lenth equal to the count of write data.If condition
is true,ifx_spi_write need to trigger one mrdy_assert. If condition is false,the mrdy_assert
will be triggered by the next ifx_spi_io.
Cc: Bi Chao <chao.bi@intel.com>
Signed-off-by: Chen Jun <jun.d.chen@intel.com>
---
 drivers/tty/serial/ifx6x60.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index ac718e1..b52ef8d 100644
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -522,7 +522,8 @@ static int ifx_spi_write(struct tty_struct *tty, const unsigned char *buf,
 	unsigned char *tmp_buf = (unsigned char *)buf;
 	int tx_count = kfifo_in_locked(&ifx_dev->tx_fifo, tmp_buf, count,
 				   &ifx_dev->fifo_lock);
-	mrdy_assert(ifx_dev);
+	if (kfifo_len(&ifx_dev->tx_fifo) == count)
+		mrdy_assert(ifx_dev);
 	return tx_count;
 }
 
-- 
1.7.4.1