[netdevice] Make all net_driver methods optional

Most network upper-layer drivers do not implement all three methods
(probe, notify, and remove).  Save code by making all methods
optional.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

2 files changed, 0 insertions, 32 deletions

diff --git a/src/arch/i386/core/cachedhcp.c b/src/arch/i386/core/cachedhcp.c
index 9ebde3e8c..b967e9b98 100644
--- a/src/arch/i386/core/cachedhcp.c
+++ b/src/arch/i386/core/cachedhcp.c
@@ -159,30 +159,8 @@ static int cachedhcp_probe ( struct net_device *netdev ) {
 	return 0;
 }
 
-/**
- * Handle network device link state change
- *
- * @v netdev		Network device
- */
-static void cachedhcp_notify ( struct net_device *netdev __unused ) {
-
-	/* Nothing to do */
-}
-
-/**
- * Handle network device removal
- *
- * @v netdev		Network device
- */
-static void cachedhcp_remove ( struct net_device *netdev __unused ) {
-
-	/* Nothing to do */
-}
-
 /** Cached DHCP packet network device driver */
 struct net_driver cachedhcp_driver __net_driver = {
 	.name = "cachedhcp",
 	.probe = cachedhcp_probe,
-	.notify = cachedhcp_notify,
-	.remove = cachedhcp_remove,
 };
diff --git a/src/arch/i386/interface/vmware/guestinfo.c b/src/arch/i386/interface/vmware/guestinfo.c
index 7fa41b86b..aa10fc015 100644
--- a/src/arch/i386/interface/vmware/guestinfo.c
+++ b/src/arch/i386/interface/vmware/guestinfo.c
@@ -244,15 +244,6 @@ static int guestinfo_net_probe ( struct net_device *netdev ) {
 }
 
 /**
- * Handle network device or link state change
- *
- * @v netdev		Network device
- */
-static void guestinfo_net_notify ( struct net_device *netdev __unused ) {
-	/* Nothing to do */
-}
-
-/**
  * Remove per-netdevice GuestInfo settings
  *
  * @v netdev		Network device
@@ -276,6 +267,5 @@ static void guestinfo_net_remove ( struct net_device *netdev ) {
 struct net_driver guestinfo_net_driver __net_driver = {
 	.name = "GuestInfo",
 	.probe = guestinfo_net_probe,
-	.notify = guestinfo_net_notify,
 	.remove = guestinfo_net_remove,
 };