[PATCH 2/2] serial: imx: check the return value when enabling the clocks

[Huang Shijie]

In the probe function, we do not check the return value of the
clk_prepare_enable(). But in actually, the clk_prepare_enable() may fails,
so check the return value when we enable the clocks.

Signed-off-by: Huang Shijie <b32955 at freescale.com>
---
 drivers/tty/serial/imx.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index bfdf764..2aec568 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1593,8 +1593,15 @@ static int serial_imx_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	clk_prepare_enable(sport->clk_per);
-	clk_prepare_enable(sport->clk_ipg);
+	ret = clk_prepare_enable(sport->clk_per);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(sport->clk_ipg);
+	if (ret) {
+		clk_disable_unprepare(sport->clk_per);
+		return ret;
+	}
 
 	sport->port.uartclk = clk_get_rate(sport->clk_per);
 
-- 
1.7.1