KEYS: remove a bogus NULL check

We already checked if "desc" was NULL at the beginning of the function
and we've dereferenced it so this causes a static checker warning.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>

security/keys/key.c

@@ -276,12 +276,10 @@ struct key *key_alloc(struct key_type *type, const char *desc,
 	if (!key)
 		goto no_memory_2;
 
-	if (desc) {
-		key->index_key.desc_len = desclen;
-		key->index_key.description = kmemdup(desc, desclen + 1, GFP_KERNEL);
-		if (!key->description)
-			goto no_memory_3;
-	}
+	key->index_key.desc_len = desclen;
+	key->index_key.description = kmemdup(desc, desclen + 1, GFP_KERNEL);
+	if (!key->description)
+		goto no_memory_3;
 
 	atomic_set(&key->usage, 1);
 	init_rwsem(&key->sem);