netdev - RE: [PATCH] hv_netvsc: do not use VF device if link is down

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Date:   Tue, 4 Aug 2020 17:26:43 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Stephen Hemminger <stephen@...workplumber.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        "Shah, Ashish N" <ashish.n.shah@...el.com>
Subject: RE: [PATCH] hv_netvsc: do not use VF device if link is down



> -----Original Message-----
> From: Stephen Hemminger <stephen@...workplumber.org>
> Sent: Tuesday, August 4, 2020 12:54 PM
> To: Haiyang Zhang <haiyangz@...rosoft.com>; davem@...emloft.net;
> kuba@...nel.org
> Cc: netdev@...r.kernel.org; wei.liu@...nel.org; Stephen Hemminger
> <stephen@...workplumber.org>; Shah, Ashish N <ashish.n.shah@...el.com>
> Subject: [PATCH] hv_netvsc: do not use VF device if link is down
> 
> If the accelerated networking SRIOV VF device has lost carrier
> use the synthetic network device which is available as backup
> path. This is a rare case since if VF link goes down, normally
> the VMBus device will also loose external connectivity as well.
> But if the communication is between two VM's on the same host
> the VMBus device will still work.
> 
> Reported-by: "Shah, Ashish N" <ashish.n.shah@...el.com>
> Fixes: 0c195567a8f6 ("netvsc: transparent VF management")
> Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>

Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>

Thank you.