[CAN]: Clean up module auto loading

Remove local char array to construct module name.
Don't call request_module() when CONFIG_KMOD is not set.

Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de>
Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 5158e88..1f51b8a 100644 (file)
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -118,7 +118,6 @@ static int can_create(struct net *net, struct socket *sock, int protocol)
 {
        struct sock *sk;
        struct can_proto *cp;
-       char module_name[sizeof("can-proto-000")];
        int err = 0;
 
        sock->state = SS_UNCONNECTED;
@@ -129,26 +128,21 @@ static int can_create(struct net *net, struct socket *sock, int protocol)
        if (net != &init_net)
                return -EAFNOSUPPORT;
 
+#ifdef CONFIG_KMOD
        /* try to load protocol module, when CONFIG_KMOD is defined */
        if (!proto_tab[protocol]) {
-               sprintf(module_name, "can-proto-%d", protocol);
-               err = request_module(module_name);
+               err = request_module("can-proto-%d", protocol);
 
                /*
                 * In case of error we only print a message but don't
                 * return the error code immediately.  Below we will
                 * return -EPROTONOSUPPORT
                 */
-               if (err == -ENOSYS) {
-                       if (printk_ratelimit())
-                               printk(KERN_INFO "can: request_module(%s)"
-                                      " not implemented.\n", module_name);
-               } else if (err) {
-                       if (printk_ratelimit())
-                               printk(KERN_ERR "can: request_module(%s)"
-                                      " failed.\n", module_name);
-               }
+               if (err && printk_ratelimit())
+                       printk(KERN_ERR "can: request_module "
+                              "(can-proto-%d) failed.\n", protocol);
        }
+#endif
 
        spin_lock(&proto_tab_lock);
        cp = proto_tab[protocol];