linux-kernel - Re: [PATCH v2] hv_utils: return error if host timesysnc update is stale

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Message-ID: <20200824145132.bn73cw7j6hzhb7ml@liuwe-devbox-debian-v2>
Date:   Mon, 24 Aug 2020 14:51:32 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Michael Kelley <mikelley@...rosoft.com>
Cc:     Vineeth Pillai <viremana@...ux.microsoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] hv_utils: return error if host timesysnc update is
 stale

On Fri, Aug 21, 2020 at 03:44:24PM +0000, Michael Kelley wrote:
> From: viremana@...ux.microsoft.com Sent: Friday, August 21, 2020 8:25 AM
> > 
> > If for any reason, host timesync messages were not processed by
> > the guest, hv_ptp_gettime() returns a stale value and the
> > caller (clock_gettime, PTP ioctl etc) has no means to know this
> > now. Return an error so that the caller knows about this.
> > 
> > Signed-off-by: Vineeth Pillai <viremana@...ux.microsoft.com>
> > ---
> > 
> >  v2:
> >     - Fix warnings reported by Kernel test robot <lkp@...el.com>
> >     - s/pr_warn/pr_warn_once/
> > 
> > ---
> >  drivers/hv/hv_util.c | 46 +++++++++++++++++++++++++++++++++-----------
> >  1 file changed, 35 insertions(+), 11 deletions(-)
> 
> Reviewed-by: Michael Kelley <mikelley@...rosoft.com>

Applied to hyperv-fixes. Thanks.