staging: lustre: libcfs: improve reporting error for crypto performance

Set cfs_crypto_hash_speeds[X] result to the actual error instead
of -1. Make the error message more clear and informative.
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5053
Reviewed-on: http://review.whamcloud.com/9990Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c

@@ -339,8 +339,8 @@ static void cfs_crypto_performance_test(enum cfs_crypto_hash_alg hash_alg)
 	__free_page(page);
 out_err:
 	if (err) {
-		cfs_crypto_hash_speeds[hash_alg] =  -1;
-		CDEBUG(D_INFO, "Crypto hash algorithm %s, err = %d\n",
+		cfs_crypto_hash_speeds[hash_alg] = err;
+		CDEBUG(D_INFO, "Crypto hash algorithm %s test error: rc = %d\n",
 		       cfs_crypto_hash_name(hash_alg), err);
 	} else {
 		unsigned long   tmp;