linux-kernel - [PATCH net, 1/2] hv_netvsc: Fix error handling in netvsc_set

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Message-ID: <1572449471-5219-2-git-send-email-haiyangz@microsoft.com>
Date:   Wed, 30 Oct 2019 15:32:11 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     "sashal@...nel.org" <sashal@...nel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     Haiyang Zhang <haiyangz@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "olaf@...fle.de" <olaf@...fle.de>, vkuznets <vkuznets@...hat.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH net, 1/2] hv_netvsc: Fix error handling in
 netvsc_set_features()

When an error is returned by rndis_filter_set_offload_params(), we should
still assign the unaffected features to ndev->features. Otherwise, these
features will be missing.

Fixes: d6792a5a0747 ("hv_netvsc: Add handler for LRO setting change")
Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
 drivers/net/hyperv/netvsc_drv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 39dddcd..734e411 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1807,8 +1807,10 @@ static int netvsc_set_features(struct net_device *ndev,
 
 	ret = rndis_filter_set_offload_params(ndev, nvdev, &offloads);
 
-	if (ret)
+	if (ret) {
 		features ^= NETIF_F_LRO;
+		ndev->features = features;
+	}
 
 syncvf:
 	if (!vf_netdev)
-- 
1.8.3.1