MLK-10406 ARM: imx: check the clk_set_rate() return value

Add return value check for clk_set_rate() to avoid set clock
rate fail.

Signed-off-by: Fugang Duan <B38611@freescale.com>
(cherry picked from commit: bcd9d743ef534cf58d2d007e6333270be12c9f06)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 85fd2b5..918bc56 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2136,8 +2136,13 @@ static int serial_imx_probe(struct platform_device *pdev)
        }
 
        sport->port.uartclk = clk_get_rate(sport->clk_per);
-       if (sport->port.uartclk > IMX_MODULE_MAX_CLK_RATE)
-               clk_set_rate(sport->clk_per, IMX_MODULE_MAX_CLK_RATE);
+       if (sport->port.uartclk > IMX_MODULE_MAX_CLK_RATE) {
+               ret = clk_set_rate(sport->clk_per, IMX_MODULE_MAX_CLK_RATE);
+               if (ret < 0) {
+                       dev_err(&pdev->dev, "clk_set_rate() failed\n");
+                       return ret;
+               }
+       }
        sport->port.uartclk = clk_get_rate(sport->clk_per);
 
        /* For register access, we only need to enable the ipg clock. */