during entropy evaluation, if the generated samples fail
any statistical test, then, all of the bits will be discarded,
and a second set of samples will be generated and tested.
the entropy delay interval should be doubled before performing the
retry.
also, ctrlpriv->rng4_sh_init and inst_handles both reads RNG DRNG
status register, but only inst_handles is updated before every retry.
so only check inst_handles and removing ctrlpriv->rng4_sh_init
Signed-off-by: Gaurav Jain <gaurav.jain@xxxxxxx>
---
drivers/crypto/caam/ctrl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index a93be395c878..18a850cf0f97 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -703,12 +703,12 @@ static int caam_ctrl_rng_init(struct device *dev)
*/
if (needs_entropy_delay_adjustment())
ent_delay = 12000;
- if (!(ctrlpriv->rng4_sh_init || inst_handles)) {
+ if (!inst_handles) {
dev_info(dev,
"Entropy delay = %u\n",
ent_delay);
kick_trng(dev, ent_delay);
- ent_delay += 400;
+ ent_delay = ent_delay * 2;
}
/*
* if instantiate_rng(...) fails, the loop will rerun
--
2.25.1
