From: Jan Henrik Weinstock jan.weinstock@rwth-aachen.de
[ Upstream commit e145f5565dc48ccaf4cb50b7cfc48777bed8c100 ]
Ensure cooldown period tolerance of 1% is actually accounted for.
Fixes: ca3bff70ab32 ("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 --- drivers/char/hw_random/timeriomem-rng.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c index f615684028af7..ba01f24db6db0 100644 --- a/drivers/char/hw_random/timeriomem-rng.c +++ b/drivers/char/hw_random/timeriomem-rng.c @@ -72,7 +72,7 @@ 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);