From: Kyle Roeschley <kyle.roeschley@ni.com>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Andrew Lunn <andrew@lunn.ch>
Subject: Re: [RFC] net: phy: smsc: Disable auto-negotiation on startup
Date: Wed, 12 Oct 2016 10:05:33 -0500 [thread overview]
Message-ID: <20161012150533.dctakcjczclk2mml@senary> (raw)
In-Reply-To: <0c2488d0-45f5-1ab7-bfa5-f19ae687a90f@gmail.com>
On Wed, Oct 12, 2016 at 02:13:06AM -0700, Florian Fainelli wrote:
> On 10/10/2016 10:41 AM, Kyle Roeschley wrote:
> > Because the SMSC PHY completes auto-negotiation before the driver is
> > ready to handle interrupts, the PHY state machine never realizes that we
> > have a link. Clear the ANENABLE bit on initialization, which lets
> > genphy_config_aneg do its thing when that code is hit later.
> >
> > While this patch does fix the problem we see (no link on boot without
> > re-plugging the cable), it seems like the generic PHY code should be
> > able to handle auto-negotiation completing before interrupts are
> > enabled. Submitted as an RFC in the hopes that someone has an idea as to
> > how that could be done.
> >
> > This fix is copied from commit 99f81afc139c ("phy: micrel: Disable auto
> > negotiation on startup").
>
> Do you mind trying:
>
> https://www.spinics.net/lists/netdev/msg397857.html
>
> and see if you do get link interrupts without your patch applied? Thanks!
Yep, that fixes it. I figured there was some state machine issue I was missing.
Thanks very much!
> --
> Florian
--
Kyle Roeschley
Software Engineer
National Instruments
next prev parent reply other threads:[~2016-10-12 15:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-10 17:41 [RFC] net: phy: smsc: Disable auto-negotiation on startup Kyle Roeschley
2016-10-11 14:32 ` Jeremy Linton
2016-10-12 15:09 ` Kyle Roeschley
2016-10-12 9:13 ` Florian Fainelli
2016-10-12 15:05 ` Kyle Roeschley [this message]
2016-10-12 19:55 ` Andrew Lunn
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