From fd277ca7ecf0daa81ad185a4a2595778cb7bf639 Mon Sep 17 00:00:00 2001
From: lsy <lsy>
Date: Thu, 12 Oct 2006 15:57:27 +0000
Subject: [PATCH] give friendly error message if crypto failed.

---
 lustre/obdclass/capa.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lustre/obdclass/capa.c b/lustre/obdclass/capa.c
index 28994f0..a3f495d 100644
--- a/lustre/obdclass/capa.c
+++ b/lustre/obdclass/capa.c
@@ -243,8 +243,11 @@ int capa_hmac(__u8 *hmac, struct lustre_capa *capa, __u8 *key)
         alg = &capa_hmac_algs[capa_alg(capa)];
 
         tfm = crypto_alloc_tfm(alg->ha_name, 0);
-        if (!tfm)
+        if (!tfm) {
+                CERROR("crypto_alloc_tfm failed, check whether your kernel"
+                       "has crypto support!\n");
                 return -ENOMEM;
+        }
         keylen = alg->ha_keylen;
 
         crypto_hmac(tfm, key, &keylen, &sl, 1, hmac);
-- 
1.8.3.1