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hwrng: timeriomem - Fix cooldown period calculation

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[ Upstream commit e145f5565dc48ccaf4cb50b7cfc48777bed8c100 ]

Ensure cooldown period tolerance of 1% is actually accounted for.

Fixes: ca3bff70ab ("hwrng: timeriomem - Improve performance...")
Signed-off-by: Jan Henrik Weinstock <jan.weinstock@rwth-aachen.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jan Henrik Weinstock 2021-02-01 16:14:59 +01:00 committed by Greg Kroah-Hartman
parent ca0d82585d
commit bebfe70c4d
1 changed files with 1 additions and 1 deletions
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2
drivers/char/hw_random/timeriomem-rng.c
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@ -69,7 +69,7 @@ static int timeriomem_rng_read(struct hwrng *hwrng, void *data,
*/
if (retval > 0)
usleep_range(period_us,
period_us + min(1, period_us / 100));
period_us + max(1, period_us / 100));
*(u32 *)data = readl(priv->io_base);
retval += sizeof(u32);