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hwrng: bcm2835 - Handle deferred clock properly 

In case the probe of the clock is deferred, we would assume it is
optional. This is wrong, so defer the probe of this driver until
the clock is available.

Fixes: 791af4f490 ("hwrng: bcm2835 - Manage an optional clock")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
hifive-unleashed-5.1
Stefan Wahren 2018-02-12 21:11:36 +01:00 committed by Herbert Xu
parent 4ff8b1dd81
commit 7b4c5d30d0
1 changed files with 2 additions and 0 deletions
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2
drivers/char/hw_random/bcm2835-rng.c
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@ -163,6 +163,8 @@ static int bcm2835_rng_probe(struct platform_device *pdev)
/* Clock is optional on most platforms */
priv->clk = devm_clk_get(dev, NULL);
if (IS_ERR(priv->clk) && PTR_ERR(priv->clk) == -EPROBE_DEFER)
return -EPROBE_DEFER;
priv->rng.name = pdev->name;
priv->rng.init = bcm2835_rng_init;