diff options
| author | Gaurav Jain <gaurav.jain@nxp.com> | 2025-09-05 15:41:48 +0530 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2025-09-13 12:11:06 +0800 |
| commit | 9048beca9c5614d486e2b492c0a7867164bf56a8 (patch) | |
| tree | d751b3ed8ef8b0ea607a6f227ff3b3cbf921fac4 | |
| parent | 4fcd322914068f2c6aec7bb5cfd12ce0207b3a21 (diff) | |
crypto: caam - double the entropy delay interval for retry
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@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index ca4f6eb53b9f..320be5d77737 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 |