[PATCH] hwrng: bcm2835 - remove redundant null check

[Tian Tao]

clk_prepare_enable() and clk_disable_unprepare() will check
NULL clock parameter, so It is not necessary to add additional checks.

Signed-off-by: Tian Tao <tiant...@hisilicon.com>
---
 drivers/char/hw_random/bcm2835-rng.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/char/hw_random/bcm2835-rng.c 
b/drivers/char/hw_random/bcm2835-rng.c
index 1a7c43b..ed0aa51 100644
--- a/drivers/char/hw_random/bcm2835-rng.c
+++ b/drivers/char/hw_random/bcm2835-rng.c
@@ -88,11 +88,9 @@ static int bcm2835_rng_init(struct hwrng *rng)
        int ret = 0;
        u32 val;
 
-       if (!IS_ERR(priv->clk)) {
-               ret = clk_prepare_enable(priv->clk);
-               if (ret)
-                       return ret;
-       }
+       ret = clk_prepare_enable(priv->clk);
+       if (ret)
+               return ret;
 
        if (priv->mask_interrupts) {
                /* mask the interrupt */
@@ -115,8 +113,7 @@ static void bcm2835_rng_cleanup(struct hwrng *rng)
        /* disable rng hardware */
        rng_writel(priv, 0, RNG_CTRL);
 
-       if (!IS_ERR(priv->clk))
-               clk_disable_unprepare(priv->clk);
+       clk_disable_unprepare(priv->clk);
 }
 
 struct bcm2835_rng_of_data {
-- 
2.7.4