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>

1 files changed, 12 insertions, 4 deletions

diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c
index e260f1f899db..1a5da1e13077 100644
--- 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));