hwrng: timeriomem - Fix cooldown period calculation

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>

diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c
index e262445fed5f5353460e8dd0a3f7553f7d7bfafe..f35f0f31f52adece65b0aa10fcccaa5aebbb9eff 100644 (file)
--- a/drivers/char/hw_random/timeriomem-rng.c
+++ b/drivers/char/hw_random/timeriomem-rng.c
@@ -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);