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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Stephen Hemminger <sthemmin@microsoft.com>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 623/639] hv_netvsc: flag software created hash value
Date:   Fri, 24 Jan 2020 10:33:13 +0100
Message-Id: <20200124093207.654124652@linuxfoundation.org>
In-Reply-To: <20200124093047.008739095@linuxfoundation.org>
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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 54670c9905c79..7ab576d8b6227 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