hwrng: mxc-rnga - 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: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c
index 19a12ac64a9e..6a86b6f56af2 100644
--- a/drivers/char/hw_random/mxc-rnga.c
+++ b/drivers/char/hw_random/mxc-rnga.c
@@ -164,7 +164,9 @@ static int __init mxc_rnga_probe(struct platform_device *pdev)
                 goto out;
         }
 
-        clk_prepare_enable(mxc_rng->clk);
+        err = clk_prepare_enable(mxc_rng->clk);
+        if (err)
+                goto out;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         mxc_rng->mem = devm_ioremap_resource(&pdev->dev, res);