3 files changed, 12 insertions, 8 deletions
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 47b481095d77..f9bcf4a665bc 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -67,6 +67,7 @@ module_param(rx_drain_timeout_msecs, uint, 0444);
 unsigned int rx_stall_timeout_msecs = 60000;
 module_param(rx_stall_timeout_msecs, uint, 0444);
 
+#define MAX_QUEUES_DEFAULT 8
 unsigned int xenvif_max_queues;
 module_param_named(max_queues, xenvif_max_queues, uint, 0644);
 MODULE_PARM_DESC(max_queues,
@@ -1622,11 +1623,12 @@ static int __init netback_init(void)
 	if (!xen_domain())
 		return -ENODEV;
 
-	/* Allow as many queues as there are CPUs if user has not
+	/* Allow as many queues as there are CPUs but max. 8 if user has not
 	 * specified a value.
 	 */
 	if (xenvif_max_queues == 0)
-		xenvif_max_queues = num_online_cpus();
+		xenvif_max_queues = min_t(unsigned int, MAX_QUEUES_DEFAULT,
+					  num_online_cpus());
 
 	if (fatal_skb_slots < XEN_NETBK_LEGACY_SLOTS_MAX) {
 		pr_info("fatal_skb_slots too small (%d), bump it to XEN_NETBK_LEGACY_SLOTS_MAX (%d)\n",
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 85b742e1c42f..bb854f92f5a5 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -734,7 +734,7 @@ static int xen_net_read_mac(struct xenbus_device *dev, u8 mac[])
 }
 
 static void xen_net_rate_changed(struct xenbus_watch *watch,
-				const char **vec, unsigned int len)
+				 const char *path, const char *token)
 {
 	struct xenvif *vif = container_of(watch, struct xenvif, credit_watch);
 	struct xenbus_device *dev = xenvif_to_xenbus_device(vif);
@@ -791,7 +791,7 @@ static void xen_unregister_credit_watch(struct xenvif *vif)
 }
 
 static void xen_mcast_ctrl_changed(struct xenbus_watch *watch,
-				   const char **vec, unsigned int len)
+				   const char *path, const char *token)
 {
 	struct xenvif *vif = container_of(watch, struct xenvif,
 					  mcast_ctrl_watch);
@@ -866,8 +866,8 @@ static void unregister_hotplug_status_watch(struct backend_info *be)
 }
 
 static void hotplug_status_changed(struct xenbus_watch *watch,
-				   const char **vec,
-				   unsigned int vec_size)
+				   const char *path,
+				   const char *token)
 {
 	struct backend_info *be = container_of(watch,
 					       struct backend_info,
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 1e4125a98291..9c72842e3a58 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -57,6 +57,7 @@
 #include <xen/interface/grant_table.h>
 
 /* Module parameters */
+#define MAX_QUEUES_DEFAULT 8
 static unsigned int xennet_max_queues;
 module_param_named(max_queues, xennet_max_queues, uint, 0644);
 MODULE_PARM_DESC(max_queues,
@@ -2166,11 +2167,12 @@ static int __init netif_init(void)
 
 	pr_info("Initialising Xen virtual ethernet driver\n");
 
-	/* Allow as many queues as there are CPUs if user has not
+	/* Allow as many queues as there are CPUs inut max. 8 if user has not
 	 * specified a value.
 	 */
 	if (xennet_max_queues == 0)
-		xennet_max_queues = num_online_cpus();
+		xennet_max_queues = min_t(unsigned int, MAX_QUEUES_DEFAULT,
+					  num_online_cpus());
 
 	return xenbus_register_frontend(&netfront_driver);
 }