hwrng: core - allow perfect entropy from hardware devices
Hardware random number quality is measured from 0 (no entropy) to 1024 (perfect entropy). Allow hardware devices to assert the full range by truncating the device-provided value at 1024 instead of 1023. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -179,7 +179,8 @@ skip_init:
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add_early_randomness(rng);
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current_quality = rng->quality ? : default_quality;
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current_quality &= 1023;
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if (current_quality > 1024)
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current_quality = 1024;
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if (current_quality == 0 && hwrng_fill)
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kthread_stop(hwrng_fill);
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