[ Upstream commite145f5565d] 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>