net accel: Prevent frontend network accelerator plugin loading in dom0

Generate error if frontend plugin tries to connect on dom0

Signed-off-by: Kieran Mansley <kmansley@solarflare.com>

diff --git a/drivers/xen/netfront/accel.c b/drivers/xen/netfront/accel.c
index d034b23369dc3fedfb5e78d54590f7995e035ed3..1a2b849c9e8765cd9870893c5d1e8753d9596a47 100644 (file)
--- a/drivers/xen/netfront/accel.c
+++ b/drivers/xen/netfront/accel.c
@@ -446,6 +446,9 @@ int netfront_accelerator_loaded(int version, const char *frontend,
 {
        struct netfront_accelerator *accelerator;
 
+       if (is_initial_xendomain())
+               return -EINVAL;
+
        if (version != NETFRONT_ACCEL_VERSION) {
                if (version > NETFRONT_ACCEL_VERSION) {
                        /* Caller has higher version number, leave it