1 files changed, 24 insertions, 13 deletions

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 66979cf7fca..7d76c952339 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -42,6 +42,12 @@ static struct netvsc_device *alloc_net_device(struct hv_device *device)
 	if (!net_device)
 		return NULL;
 
+	net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL);
+	if (!net_device->cb_buffer) {
+		kfree(net_device);
+		return NULL;
+	}
+
 	init_waitqueue_head(&net_device->wait_drain);
 	net_device->start_remove = false;
 	net_device->destroy = false;
@@ -52,6 +58,12 @@ static struct netvsc_device *alloc_net_device(struct hv_device *device)
 	return net_device;
 }
 
+static void free_netvsc_device(struct netvsc_device *nvdev)
+{
+	kfree(nvdev->cb_buffer);
+	kfree(nvdev);
+}
+
 static struct netvsc_device *get_outbound_net_device(struct hv_device *device)
 {
 	struct netvsc_device *net_device;
@@ -551,7 +563,7 @@ int netvsc_device_remove(struct hv_device *device)
 	if (net_device->sub_cb_buf)
 		vfree(net_device->sub_cb_buf);
 
-	kfree(net_device);
+	free_netvsc_device(net_device);
 	return 0;
 }
 
@@ -705,6 +717,7 @@ int netvsc_send(struct hv_device *device,
 	unsigned int section_index = NETVSC_INVALID_INDEX;
 	u32 msg_size = 0;
 	struct sk_buff *skb;
+	u16 q_idx = packet->q_idx;
 
 
 	net_device = get_outbound_net_device(device);
@@ -769,24 +782,24 @@ int netvsc_send(struct hv_device *device,
 
 	if (ret == 0) {
 		atomic_inc(&net_device->num_outstanding_sends);
-		atomic_inc(&net_device->queue_sends[packet->q_idx]);
+		atomic_inc(&net_device->queue_sends[q_idx]);
 
 		if (hv_ringbuf_avail_percent(&out_channel->outbound) <
 			RING_AVAIL_PERCENT_LOWATER) {
 			netif_tx_stop_queue(netdev_get_tx_queue(
-					    ndev, packet->q_idx));
+					    ndev, q_idx));
 
 			if (atomic_read(&net_device->
-				queue_sends[packet->q_idx]) < 1)
+				queue_sends[q_idx]) < 1)
 				netif_tx_wake_queue(netdev_get_tx_queue(
-						    ndev, packet->q_idx));
+						    ndev, q_idx));
 		}
 	} else if (ret == -EAGAIN) {
 		netif_tx_stop_queue(netdev_get_tx_queue(
-				    ndev, packet->q_idx));
-		if (atomic_read(&net_device->queue_sends[packet->q_idx]) < 1) {
+				    ndev, q_idx));
+		if (atomic_read(&net_device->queue_sends[q_idx]) < 1) {
 			netif_tx_wake_queue(netdev_get_tx_queue(
-					    ndev, packet->q_idx));
+					    ndev, q_idx));
 			ret = -ENOSPC;
 		}
 	} else {
@@ -1042,10 +1055,8 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
 	struct net_device *ndev;
 
 	net_device = alloc_net_device(device);
-	if (!net_device) {
-		ret = -ENOMEM;
-		goto cleanup;
-	}
+	if (!net_device)
+		return -ENOMEM;
 
 	net_device->ring_size = ring_size;
 
@@ -1093,7 +1104,7 @@ close:
 	vmbus_close(device->channel);
 
 cleanup:
-	kfree(net_device);
+	free_netvsc_device(net_device);
 
 	return ret;
 }