Use devm_hwrng_register to get rid of manual unregistration.

Signed-off-by: Tian Tao <tiant...@hisilicon.com>
---
 drivers/char/hw_random/pic32-rng.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/hw_random/pic32-rng.c 
b/drivers/char/hw_random/pic32-rng.c
index e8210c1..99c8bd0 100644
--- a/drivers/char/hw_random/pic32-rng.c
+++ b/drivers/char/hw_random/pic32-rng.c
@@ -96,7 +96,7 @@ static int pic32_rng_probe(struct platform_device *pdev)
        priv->rng.name = pdev->name;
        priv->rng.read = pic32_rng_read;
 
-       ret = hwrng_register(&priv->rng);
+       ret = devm_hwrng_register(&pdev->dev, &priv->rng);
        if (ret)
                goto err_register;
 
@@ -113,7 +113,6 @@ static int pic32_rng_remove(struct platform_device *pdev)
 {
        struct pic32_rng *rng = platform_get_drvdata(pdev);
 
-       hwrng_unregister(&rng->rng);
        writel(0, rng->base + RNGCON);
        clk_disable_unprepare(rng->clk);
        return 0;
-- 
2.7.4

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