netdev - RE: [PATCH] i40e: report correct VF link speed when link state is set to enable

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Message-ID: <DM6PR11MB2890AC827D2F779D985D2513BC070@DM6PR11MB2890.namprd11.prod.outlook.com>
Date:   Mon, 12 Oct 2020 22:20:08 +0000
From:   "Brown, Aaron F" <aaron.f.brown@...el.com>
To:     Stefan Assmann <sassmann@...nic.de>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
        "Yang, Lihong" <lihong.yang@...el.com>
Subject: RE: [PATCH] i40e: report correct VF link speed when link state is set
 to enable

> From: netdev-owner@...r.kernel.org <netdev-owner@...r.kernel.org> On
> Behalf Of Stefan Assmann
> Sent: Wednesday, September 9, 2020 1:22 AM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: netdev@...r.kernel.org; davem@...emloft.net; Kirsher, Jeffrey T
> <jeffrey.t.kirsher@...el.com>; Yang, Lihong <lihong.yang@...el.com>;
> sassmann@...nic.de
> Subject: [PATCH] i40e: report correct VF link speed when link state is set to
> enable
> 
> When the virtual link state was set to "enable" ethtool would report
> link speed as 40000Mb/s regardless of the underlying device.
> Report the correct link speed.
> 
> Example from a XXV710 NIC.
> Before:
> $ ip link set ens3f0 vf 0 state auto
> $  ethtool enp8s2 | grep Speed
>         Speed: 25000Mb/s
> $ ip link set ens3f0 vf 0 state enable
> $ ethtool enp8s2 | grep Speed
>         Speed: 40000Mb/s
> After:
> $ ip link set ens3f0 vf 0 state auto
> $  ethtool enp8s2 | grep Speed
>         Speed: 25000Mb/s
> $ ip link set ens3f0 vf 0 state enable
> $ ethtool enp8s2 | grep Speed
>         Speed: 25000Mb/s
> 
> Signed-off-by: Stefan Assmann <sassmann@...nic.de>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

Tested-by: Aaron Brown <aaron.f.brown@...el.com>