diff options
Diffstat (limited to 'drivers/crypto/caam')
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 9 | ||||
| -rw-r--r-- | drivers/crypto/caam/regs.h | 2 |
2 files changed, 10 insertions, 1 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index 8908d040b1f2..111ac1ffbc11 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -544,6 +544,9 @@ static int caam_probe(struct platform_device *pdev) * the TRNG parameters. */ if (!(ctrlpriv->rng4_sh_init || inst_handles)) { + dev_info(dev, + "Entropy delay = %u\n", + ent_delay); kick_trng(pdev, ent_delay); ent_delay += 400; } @@ -556,6 +559,12 @@ static int caam_probe(struct platform_device *pdev) */ ret = instantiate_rng(dev, inst_handles, gen_sk); + if (ret == -EAGAIN) + /* + * if here, the loop will rerun, + * so don't hog the CPU + */ + cpu_relax(); } while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX)); if (ret) { dev_err(dev, "failed to instantiate RNG"); diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h index b8bd980ac00a..5fa739c290a7 100644 --- a/drivers/crypto/caam/regs.h +++ b/drivers/crypto/caam/regs.h @@ -278,7 +278,7 @@ struct rng4tst { }; #define RTSDCTL_ENT_DLY_SHIFT 16 #define RTSDCTL_ENT_DLY_MASK (0xffff << RTSDCTL_ENT_DLY_SHIFT) -#define RTSDCTL_ENT_DLY_MIN 1200 +#define RTSDCTL_ENT_DLY_MIN 3200 #define RTSDCTL_ENT_DLY_MAX 12800 u32 rtsdctl; /* seed control register */ union { |