[PATCH v2 16/25] crypto: testmgr - Report failure on zero-length crypto_rng_get_bytes

[George Spelvin]

If crypto_rng_get_bytes returns an error code, returning it is a good
idea, but if it simply returns zero, the test shouldn't abort successfully.

Signed-off-by: George Spelvin <li...@horizon.com>
---
 crypto/testmgr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 0e179c72..9faf265f 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1476,6 +1476,8 @@ static int test_cprng(struct crypto_rng *tfm,
                                       "the correct amount of random data for "
                                       "%s (requested %d, got %d)\n", algo,
                                       template[i].rlen, err);
+                               if (err >= 0)
+                                       err = -EINVAL;
                                break;
                        }
                }
-- 
2.1.3

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