netdev - Re: [PATCH net-next v3 1/6] net: phy: mscc: migrate to phy_select/restore

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Date:   Mon, 19 Nov 2018 17:12:04 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Andreas Schwab <schwab@...e.de>
Cc:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Quentin Schulz <quentin.schulz@...tlin.com>,
        davem@...emloft.net, f.fainelli@...il.com,
        allan.nielsen@...rochip.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, thomas.petazzoni@...tlin.com,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH net-next v3 1/6] net: phy: mscc: migrate to
 phy_select/restore_page functions

On Mon, Nov 19, 2018 at 04:50:14PM +0100, Andreas Schwab wrote:
> On Nov 19 2018, Alexandre Belloni <alexandre.belloni@...tlin.com> wrote:
> 
> > My first intuition is that he mac driver quentin is using does
> > phy_connect when the interface is opened while macb is doing it at probe
> > time. I didn't investigate but maybe this can help :)
> 
> The phy probing of macb is very unreliable, perhaps it needs to be
> rewritten.

Hi Andreas

I still don't see why that would cause a hang.

Could you turn on lockdep and see if it reports a deadlock.

Thanks
	Andrew