hyperv: Remove extra allocated space for recv_pkt_list elements

The receive code path doesn't use the page buffer, so remove the
extra allocated space here.
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/hyperv/hyperv_net.h

@@ -465,8 +465,6 @@ struct nvsp_message {
 
 #define NETVSC_RECEIVE_BUFFER_ID		0xcafe
 
-#define NETVSC_RECEIVE_SG_COUNT			1
-
 /* Preallocated receive packets */
 #define NETVSC_RECEIVE_PACKETLIST_COUNT		256
 

drivers/net/hyperv/netvsc.c

@@ -904,9 +904,7 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
 	INIT_LIST_HEAD(&net_device->recv_pkt_list);
 
 	for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) {
-		packet = kzalloc(sizeof(struct hv_netvsc_packet) +
-				 (NETVSC_RECEIVE_SG_COUNT *
-				  sizeof(struct hv_page_buffer)), GFP_KERNEL);
+		packet = kzalloc(sizeof(struct hv_netvsc_packet), GFP_KERNEL);
 		if (!packet)
 			break;