Use cryptd(%s) as cryptd-ed algorithm name instead of %s

[Huang Ying]

Because:

1. if use %s, you can only request cryptd(<driver name>), not
   cryptd(<alg name>), because generated new algorithm instance has
   algorithm name: <alg name> and driver name cryptd(<driver name>).

2. Generated cryptd-ed algorithm will have the same algorithm name and
   higher priority, but some user may not want to use cryptd-ed
   version.

Signed-off-by: Huang Ying <ying.hu...@intel.com>

---
 crypto/cryptd.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -215,7 +215,9 @@ static struct crypto_instance *cryptd_al
 
        ctx->state = state;
 
-       memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
+       if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
+                    "cryptd(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME)
+               goto out_free_inst;
 
        inst->alg.cra_priority = alg->cra_priority + 50;
        inst->alg.cra_blocksize = alg->cra_blocksize;

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