[PATCH AUTOSEL 4.19 635/671] hv_netvsc: flag software created hash value

Sasha Levin
2020-01-16T17:14:05Z

From: Stephen Hemminger <sthemmin@microsoft.com>

[ Upstream commit df9f540ca74297a84bafacfa197e9347b20beea5 ]

When the driver needs to create a hash value because it
was not done at higher level, then the hash should be marked
as a software not hardware hash.

Fixes: f72860afa2e3 ("hv_netvsc: Exclude non-TCP port numbers from vRSS hashing")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/hyperv/netvsc_drv.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 54670c9905c7..7ab576d8b622 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -295,9 +295,9 @@ static inline u32 netvsc_get_hash(
else if (flow.basic.n_proto == htons(ETH_P_IPV6))
hash = jhash2((u32 *)&flow.addrs.v6addrs, 8, hashrnd);
else
- hash = 0;
+ return 0;

- skb_set_hash(skb, hash, PKT_HASH_TYPE_L3);
+ __skb_set_sw_hash(skb, hash, false);
}

return hash;
@@ -804,8 +804,7 @@ static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net,
skb->protocol == htons(ETH_P_IP))
netvsc_comp_ipcsum(skb);

- /* Do L4 checksum offload if enabled and present.
- */
+ /* Do L4 checksum offload if enabled and present. */
if (csum_info && (net->features & NETIF_F_RXCSUM)) {
if (csum_info->receive.tcp_checksum_succeeded ||
csum_info->receive.udp_checksum_succeeded)
--
2.20.1