ASoC: fsl: imx-audmux: Check the return value from clk_prepare_enable()

clk_prepare_enable() may fail, so let's check its return value and propagate it
in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c
index e260f1f899dbb132135cb6745376f5dad8891fb9..1a5da1e13077f85986052cac2ba41004a31d0020 100644 (file)
--- a/sound/soc/fsl/imx-audmux.c
+++ b/sound/soc/fsl/imx-audmux.c
@@ -73,8 +73,11 @@ static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
        if (!buf)
                return -ENOMEM;
 
-       if (audmux_clk)
-               clk_prepare_enable(audmux_clk);
+       if (audmux_clk) {
+               ret = clk_prepare_enable(audmux_clk);
+               if (ret)
+                       return ret;
+       }
 
        ptcr = readl(audmux_base + IMX_AUDMUX_V2_PTCR(port));
        pdcr = readl(audmux_base + IMX_AUDMUX_V2_PDCR(port));
@@ -224,14 +227,19 @@ EXPORT_SYMBOL_GPL(imx_audmux_v1_configure_port);
 int imx_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
                unsigned int pdcr)
 {
+       int ret;
+
        if (audmux_type != IMX31_AUDMUX)
                return -EINVAL;
 
        if (!audmux_base)
                return -ENOSYS;
 
-       if (audmux_clk)
-               clk_prepare_enable(audmux_clk);
+       if (audmux_clk) {
+               ret = clk_prepare_enable(audmux_clk);
+               if (ret)
+                       return ret;
+       }
 
        writel(ptcr, audmux_base + IMX_AUDMUX_V2_PTCR(port));
        writel(pdcr, audmux_base + IMX_AUDMUX_V2_PDCR(port));