diff options
| author | Gaurav Jain <gaurav.jain@nxp.com> | 2025-09-05 15:41:48 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-24 10:29:38 +0100 |
| commit | 160b03e57e624c8b27a46babafbdfca543bc83bf (patch) | |
| tree | 2b644b8a81f960bfe7716db1bf4ce44e2deebcd3 /drivers/crypto | |
| parent | 01be9fad74e43c0a211eb95f11f04667d87cda1e (diff) | |
crypto: caam - double the entropy delay interval for retry
[ Upstream commit 9048beca9c5614d486e2b492c0a7867164bf56a8 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/crypto')
| -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 bdf367f3f679..eb880f0435ee 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -692,12 +692,12 @@ 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 |