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authorTian Tao <tiantao6@hisilicon.com>2021-02-10 04:14:58 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2021-03-07 07:13:14 +0300
commite06da499d69a0b34d5824c5fde38f1f7e1eb9833 (patch)
tree9cc49c8fbf9ab0999bdcaeceafaa0d7dafa4b136 /drivers/char
parentf17a25cb1776c5712e950aaf326528ae652a086c (diff)
downloadlinux-e06da499d69a0b34d5824c5fde38f1f7e1eb9833.tar.xz
hwrng: bcm2835 - remove redundant null check
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 <tiantao6@hisilicon.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/hw_random/bcm2835-rng.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c
index 1a7c43b43c6b..be5be395b341 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 {
@@ -155,9 +152,9 @@ static int bcm2835_rng_probe(struct platform_device *pdev)
return PTR_ERR(priv->base);
/* Clock is optional on most platforms */
- priv->clk = devm_clk_get(dev, NULL);
- if (PTR_ERR(priv->clk) == -EPROBE_DEFER)
- return -EPROBE_DEFER;
+ priv->clk = devm_clk_get_optional(dev, NULL);
+ if (IS_ERR(priv->clk))
+ return PTR_ERR(priv->clk);
priv->rng.name = pdev->name;
priv->rng.init = bcm2835_rng_init;