Ensure hooks set if accelerator loads before first network interface

diff -r 7f386cf89345 drivers/xen/netfront/accel.c
--- a/drivers/xen/netfront/accel.c	Fri Oct 26 13:56:56 2007 +0100
+++ b/drivers/xen/netfront/accel.c	Fri Oct 26 13:58:14 2007 +0100
@@ -131,7 +131,8 @@ static void add_accelerator_vif(struct n
  * Initialise the state to track an accelerator plugin module.
  */ 
 static int init_accelerator(const char *frontend, 
-			    struct netfront_accelerator **result)
+			    struct netfront_accelerator **result,
+			    struct netfront_accel_hooks *hooks)
 {
 	struct netfront_accelerator *accelerator = 
 		kmalloc(sizeof(struct netfront_accelerator), GFP_KERNEL);
@@ -154,7 +155,7 @@ static int init_accelerator(const char *
 	INIT_LIST_HEAD(&accelerator->vif_states);
 	spin_lock_init(&accelerator->vif_states_lock);
 
-	accelerator->hooks = NULL;
+	accelerator->hooks = hooks;
 
 	accelerator->ready_for_probe = 1;
 	accelerator->need_probe = NULL;
@@ -278,7 +279,7 @@ int netfront_load_accelerator(struct net
 	}
 
 	/* Couldn't find it, so create a new one and load the module */
-	if ((rc = init_accelerator(frontend, &accelerator)) < 0) {
+	if ((rc = init_accelerator(frontend, &accelerator, NULL)) < 0) {
 		spin_unlock_irqrestore(&accelerators_lock, flags);
 		return rc;
 	}
@@ -450,7 +451,7 @@ int netfront_accelerator_loaded(int vers
 	DPRINTK("Couldn't find matching accelerator (%s)\n",
 		frontend);
 
-	init_accelerator(frontend, &accelerator);
+	init_accelerator(frontend, &accelerator, hooks);
 
 	spin_unlock_irqrestore(&accelerators_lock, flags);