[PATCH net-next] hv_netvsc: Set needed_headroom according to VF

Set needed_headroom according to VF if VF needs a bigger
headroom.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 drivers/net/hyperv/netvsc_drv.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index f682a5572d84..382bebc2420d 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c

@@ -2384,6 +2384,9 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
 	dev_hold(vf_netdev);
 	rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev);
 
+	if (ndev->needed_headroom < vf_netdev->needed_headroom)
+		ndev->needed_headroom = vf_netdev->needed_headroom;
+
 	vf_netdev->wanted_features = ndev->features;
 	netdev_update_features(vf_netdev);
 

@@ -2462,6 +2465,8 @@ static int netvsc_unregister_vf(struct net_device *vf_netdev)
 	RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL);
 	dev_put(vf_netdev);
 
+	ndev->needed_headroom = RNDIS_AND_PPI_SIZE;
+
 	return NOTIFY_OK;
 }
 

-- 
2.25.1

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Fri, 18 Jun 2021 12:35:39 -0700 you wrote:

Set needed_headroom according to VF if VF needs a bigger
headroom.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 drivers/net/hyperv/netvsc_drv.c | 5 +++++
 1 file changed, 5 insertions(+)

Here is the summary with links:
  - [net-next] hv_netvsc: Set needed_headroom according to VF
    https://git.kernel.org/netdev/net/c/536ba2e06d1a

You are awesome, thank you!
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