1 files changed, 27 insertions, 9 deletions

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 8b537a049c1e..73b60592de06 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -774,8 +774,8 @@ cleanup:
 	return ret;
 }
 
-int rndis_filter_set_rss_param(struct rndis_device *rdev,
-			       const u8 *rss_key)
+static int rndis_set_rss_param_msg(struct rndis_device *rdev,
+				   const u8 *rss_key, u16 flag)
 {
 	struct net_device *ndev = rdev->ndev;
 	struct rndis_request *request;
@@ -804,7 +804,7 @@ int rndis_filter_set_rss_param(struct rndis_device *rdev,
 	rssp->hdr.type = NDIS_OBJECT_TYPE_RSS_PARAMETERS;
 	rssp->hdr.rev = NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2;
 	rssp->hdr.size = sizeof(struct ndis_recv_scale_param);
-	rssp->flag = 0;
+	rssp->flag = flag;
 	rssp->hashinfo = NDIS_HASH_FUNC_TOEPLITZ | NDIS_HASH_IPV4 |
 			 NDIS_HASH_TCP_IPV4 | NDIS_HASH_IPV6 |
 			 NDIS_HASH_TCP_IPV6;
@@ -829,9 +829,12 @@ int rndis_filter_set_rss_param(struct rndis_device *rdev,
 
 	wait_for_completion(&request->wait_event);
 	set_complete = &request->response_msg.msg.set_complete;
-	if (set_complete->status == RNDIS_STATUS_SUCCESS)
-		memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
-	else {
+	if (set_complete->status == RNDIS_STATUS_SUCCESS) {
+		if (!(flag & NDIS_RSS_PARAM_FLAG_DISABLE_RSS) &&
+		    !(flag & NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED))
+			memcpy(rdev->rss_key, rss_key, NETVSC_HASH_KEYLEN);
+
+	} else {
 		netdev_err(ndev, "Fail to set RSS parameters:0x%x\n",
 			   set_complete->status);
 		ret = -EINVAL;
@@ -842,6 +845,16 @@ cleanup:
 	return ret;
 }
 
+int rndis_filter_set_rss_param(struct rndis_device *rdev,
+			       const u8 *rss_key)
+{
+	/* Disable RSS before change */
+	rndis_set_rss_param_msg(rdev, rss_key,
+				NDIS_RSS_PARAM_FLAG_DISABLE_RSS);
+
+	return rndis_set_rss_param_msg(rdev, rss_key, 0);
+}
+
 static int rndis_filter_query_device_link_status(struct rndis_device *dev,
 						 struct netvsc_device *net_device)
 {
@@ -1121,7 +1134,9 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc)
  * This breaks overlap of processing the host message for the
  * new primary channel with the initialization of sub-channels.
  */
-int rndis_set_subchannel(struct net_device *ndev, struct netvsc_device *nvdev)
+int rndis_set_subchannel(struct net_device *ndev,
+			 struct netvsc_device *nvdev,
+			 struct netvsc_device_info *dev_info)
 {
 	struct nvsp_message *init_packet = &nvdev->channel_init_pkt;
 	struct net_device_context *ndev_ctx = netdev_priv(ndev);
@@ -1161,8 +1176,11 @@ int rndis_set_subchannel(struct net_device *ndev, struct netvsc_device *nvdev)
 	wait_event(nvdev->subchan_open,
 		   atomic_read(&nvdev->open_chn) == nvdev->num_chn);
 
-	/* ignore failues from setting rss parameters, still have channels */
-	rndis_filter_set_rss_param(rdev, netvsc_hash_key);
+	/* ignore failures from setting rss parameters, still have channels */
+	if (dev_info)
+		rndis_filter_set_rss_param(rdev, dev_info->rss_key);
+	else
+		rndis_filter_set_rss_param(rdev, netvsc_hash_key);
 
 	netif_set_real_num_tx_queues(ndev, nvdev->num_chn);
 	netif_set_real_num_rx_queues(ndev, nvdev->num_chn);