[dpdk-stable] [PATCH] net/virtio: fix link status always being up

[Yuanhan Liu]

On Fri, Apr 14, 2017 at 02:36:45PM +0800, Yuanhan Liu wrote:
> The virtio port link status will always be UP, even the port is stopped:
> 
>     testpmd> port stop 0
>     Stopping ports...
>     Checking link statuses...
>     Port 0 Link Up - speed 10000 Mbps - full-duplex
>     Done
> 
> The link status is queried by link_update callback when LSC is disabled.
> Which in turn queries the "status" field.  However, the "status" is
> read-only. I couldn't think of some proper ways to change the status
> without doing device reset.
> 
> Instead of doing (the heavy) reset at stop, this patch introduced a flag,
> which is set to 1 and 0 on start and stop, respectively. When it's set to
> 0, the link status is set to DOWN unconditionally.
> 
> Fixes: a85786dc816f ("virtio: fix states handling during initialization")
> 
> Cc: stable at dpdk.org
> Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>

Applied to dpdk-next-virtio.

	--yliu