[PATCH 4.16 124/272] net: hns3: fix for returning wrong value problem in hns3_get_rss_key_size

[Greg Kroah-Hartman]

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Fuyun Liang <liangfuyun1@xxxxxxxxxx>

[ Upstream commit 3bd6d258b1d5f76744567855d1376358a94f127d ]

The return type of hns3_get_rss_key_size is u32. But a negative value is
returned. This patch fixes it by replacing the negative value with zero.

Signed-off-by: Fuyun Liang <liangfuyun1@xxxxxxxxxx>
Signed-off-by: Peng Li <lipeng321@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -698,7 +698,7 @@ static u32 hns3_get_rss_key_size(struct
 
 	if (!h->ae_algo || !h->ae_algo->ops ||
 	    !h->ae_algo->ops->get_rss_key_size)
-		return -EOPNOTSUPP;
+		return 0;
 
 	return h->ae_algo->ops->get_rss_key_size(h);
 }