Am Sonntag, 26. März 2017, 18:01:26 CEST schrieb Krzysztof Kozlowski: Hi Krzysztof, > > > + if (slen < EXYNOS_RNG_SEED_SIZE) { > > > + dev_warn(rng->dev, "Seed too short (only %u bytes)\n", > > > slen); + return -EINVAL; > > > + } > > > > Will it be helpful to print the required seed size? > > It is in /proc/crypto... It is not a problem to print it but isn't that > redundant? You also get the information from crypto_user. See [1] for a user space API. [1] https://github.com/smuellerDD/libkcapi/commit/ f856e8c655b7e5c53f59ef8c5754ad59b196df08 Ciao Stephan