Re: [PATCH net-next,2/2] hv_netvsc: Fix the carrier state error when data path is off

From: David Miller
Date: Thu Jun 22 2017 - 13:31:21 EST

From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 21 Jun 2017 16:40:47 -0700

> From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> When the VF NIC is opened, the synthetic NIC's carrier state is set to
> off. This tells the host to transitions data path to the VF device. But
> if startup script or user manipulates the admin state of the netvsc
> device directly for example:
> # ifconfig eth0 down
> # ifconfig eth0 up
> Then the carrier state of the synthetic NIC would be on, even though the
> data path was still over the VF NIC. This patch sets the carrier state
> of synthetic NIC with consideration of the related VF state.
> Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> Reviewed-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>