From: Stephen Hemminger <sthemmin@microsoft.com>
Date: Sat, 23 Nov 2019 23:50:17 +0000 (-0800)
Subject: hv_netvsc: make recording RSS hash depend on feature flag
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6f3aeb1ba05d41320e6cf9a60f698d9c4e44348e;p=linux.git

hv_netvsc: make recording RSS hash depend on feature flag

The recording of RSS hash should be controlled by NETIF_F_RXHASH.

Fixes: 1fac7ca4e63b ("hv_netvsc: record hardware hash in skb")
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 034dbab7aa807..250bd90627a56 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -823,7 +823,8 @@ struct nvsp_message {
 
 #define NETVSC_SUPPORTED_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | \
 				      NETIF_F_TSO | NETIF_F_IPV6_CSUM | \
-				      NETIF_F_TSO6 | NETIF_F_LRO | NETIF_F_SG)
+				      NETIF_F_TSO6 | NETIF_F_LRO | \
+				      NETIF_F_SG | NETIF_F_RXHASH)
 
 #define VRSS_SEND_TAB_SIZE 16  /* must be power of 2 */
 #define VRSS_CHANNEL_MAX 64
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 5fa5c49e481b6..868e22e286ca0 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -803,7 +803,7 @@ static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
 			skb->ip_summed = CHECKSUM_UNNECESSARY;
 	}
 
-	if (hash_info)
+	if (hash_info && (net->features & NETIF_F_RXHASH))
 		skb_set_hash(skb, *hash_info, PKT_HASH_TYPE_L4);
 
 	if (vlan) {
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index c06178380ac8c..206b4e77eaf03 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -1214,6 +1214,7 @@ static int rndis_netdev_set_hwcaps(struct rndis_device *rndis_device,
 	/* Compute tx offload settings based on hw capabilities */
 	net->hw_features |= NETIF_F_RXCSUM;
 	net->hw_features |= NETIF_F_SG;
+	net->hw_features |= NETIF_F_RXHASH;
 
 	if ((hwcaps.csum.ip4_txcsum & NDIS_TXCSUM_ALL_TCP4) == NDIS_TXCSUM_ALL_TCP4) {
 		/* Can checksum TCP */