[PATCH] hwrng: ingenic - Fix a resource leak in an error handling path

[Christophe JAILLET]

In case of error, we should call 'clk_disable_unprepare()' to undo a
previous 'clk_prepare_enable()' call, as already done in the remove
function.

Fixes: 406346d22278 ("hwrng: ingenic - Add hardware TRNG for Ingenic X1830")
Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
 drivers/char/hw_random/ingenic-trng.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/char/hw_random/ingenic-trng.c 
b/drivers/char/hw_random/ingenic-trng.c
index 954a8411d67d..0eb80f786f4d 100644
--- a/drivers/char/hw_random/ingenic-trng.c
+++ b/drivers/char/hw_random/ingenic-trng.c
@@ -113,13 +113,17 @@ static int ingenic_trng_probe(struct platform_device 
*pdev)
        ret = hwrng_register(&trng->rng);
        if (ret) {
                dev_err(&pdev->dev, "Failed to register hwrng\n");
-               return ret;
+               goto err_unprepare_clk;
        }
 
        platform_set_drvdata(pdev, trng);
 
        dev_info(&pdev->dev, "Ingenic DTRNG driver registered\n");
        return 0;
+
+err_unprepare_clk:
+       clk_disable_unprepare(trng->clk);
+       return ret;
 }
 
 static int ingenic_trng_remove(struct platform_device *pdev)
-- 
2.27.0