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hwrng: bcm2835 - Handle deferred clock properly

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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>
This commit is contained in:
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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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;