diff options
| author | Tian Tao <tiantao6@hisilicon.com> | 2021-02-10 04:14:58 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-03-07 07:13:14 +0300 |
| commit | e06da499d69a0b34d5824c5fde38f1f7e1eb9833 (patch) | |
| tree | 9cc49c8fbf9ab0999bdcaeceafaa0d7dafa4b136 | |
| parent | f17a25cb1776c5712e950aaf326528ae652a086c (diff) | |
| download | linux-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>
| -rw-r--r-- | drivers/char/hw_random/bcm2835-rng.c | 17 |
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; |