hv_netvsc: Eliminate rndis_msg pointer from hv_netvsc_packet structure

Eliminate rndis_msg pointer from hv_netvsc_packet structure.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/hyperv/hyperv_net.h

@@ -149,10 +149,6 @@ struct hv_netvsc_packet {
 	void *send_completion_ctx;
 	void (*send_completion)(void *context);
 
-
-	/* This points to the memory after page_buf */
-	struct rndis_message *rndis_msg;
-
 	/* Points to the send/receive buffer where the ethernet frame is */
 	void *data;
 	struct hv_page_buffer *page_buf;
@@ -188,10 +184,12 @@ struct rndis_device {
 
 
 /* Interface */
+struct rndis_message;
 int netvsc_device_add(struct hv_device *device, void *additional_info);
 int netvsc_device_remove(struct hv_device *device);
 int netvsc_send(struct hv_device *device,
-		struct hv_netvsc_packet *packet);
+		struct hv_netvsc_packet *packet,
+		struct rndis_message *rndis_msg);
 void netvsc_linkstatus_callback(struct hv_device *device_obj,
 				struct rndis_message *resp);
 void netvsc_xmit_completion(void *context);

drivers/net/hyperv/netvsc.c

@@ -706,7 +706,8 @@ static u32 netvsc_get_next_send_section(struct netvsc_device *net_device)
 static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device,
 				   unsigned int section_index,
 				   u32 pend_size,
-				   struct hv_netvsc_packet *packet)
+				   struct hv_netvsc_packet *packet,
+				   struct rndis_message *rndis_msg)
 {
 	char *start = net_device->send_buf;
 	char *dest = start + (section_index * net_device->send_section_size)
@@ -722,7 +723,7 @@ static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device,
 	if (packet->is_data_pkt && packet->xmit_more && remain &&
 	    !packet->cp_partial) {
 		padding = net_device->pkt_align - remain;
-		packet->rndis_msg->msg_len += padding;
+		rndis_msg->msg_len += padding;
 		packet->total_data_buflen += padding;
 	}
 
@@ -841,7 +842,8 @@ static inline int netvsc_send_pkt(
 }
 
 int netvsc_send(struct hv_device *device,
-		struct hv_netvsc_packet *packet)
+		struct hv_netvsc_packet *packet,
+		struct rndis_message *rndis_msg)
 {
 	struct netvsc_device *net_device;
 	int ret = 0, m_ret = 0;
@@ -897,7 +899,7 @@ int netvsc_send(struct hv_device *device,
 	if (section_index != NETVSC_INVALID_INDEX) {
 		netvsc_copy_to_send_buf(net_device,
 					section_index, msd_len,
-					packet);
+					packet, rndis_msg);
 
 		packet->send_buf_index = section_index;
 

drivers/net/hyperv/netvsc_drv.c

@@ -483,10 +483,10 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
 	packet->is_data_pkt = true;
 	packet->total_data_buflen = skb->len;
 
-	packet->rndis_msg = (struct rndis_message *)((unsigned long)packet +
+	rndis_msg = (struct rndis_message *)((unsigned long)packet +
 				sizeof(struct hv_netvsc_packet));
 
-	memset(packet->rndis_msg, 0, RNDIS_AND_PPI_SIZE);
+	memset(rndis_msg, 0, RNDIS_AND_PPI_SIZE);
 
 	/* Set the completion routine */
 	packet->send_completion = netvsc_xmit_completion;
@@ -496,7 +496,6 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
 	isvlan = packet->vlan_tci & VLAN_TAG_PRESENT;
 
 	/* Add the rndis header */
-	rndis_msg = packet->rndis_msg;
 	rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET;
 	rndis_msg->msg_len = packet->total_data_buflen;
 	rndis_pkt = &rndis_msg->msg.pkt;
@@ -620,7 +619,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
 	packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size,
 					       skb, packet);
 
-	ret = netvsc_send(net_device_ctx->device_ctx, packet);
+	ret = netvsc_send(net_device_ctx->device_ctx, packet, rndis_msg);
 
 drop:
 	if (ret == 0) {

drivers/net/hyperv/rndis_filter.c

@@ -240,7 +240,7 @@ static int rndis_filter_send_request(struct rndis_device *dev,
 	packet->send_completion = NULL;
 	packet->xmit_more = false;
 
-	ret = netvsc_send(dev->net_dev->dev, packet);
+	ret = netvsc_send(dev->net_dev->dev, packet, NULL);
 	return ret;
 }