netdev - Re: [PATCH] net/fsl: quieten expected MDIO access failures

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Date:   Thu, 24 Sep 2020 16:12:00 +0100
From:   Jamie Iles <jamie@...iainc.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Jamie Iles <jamie@...iainc.com>, netdev@...r.kernel.org,
        Jeremy Linton <jeremy.linton@....com>
Subject: Re: [PATCH] net/fsl: quieten expected MDIO access failures

Hi Andrew,

On Thu, Sep 24, 2020 at 05:04:53PM +0200, Andrew Lunn wrote:
> On Thu, Sep 24, 2020 at 03:56:45PM +0100, Jamie Iles wrote:
> > MDIO reads can happen during PHY probing, and printing an error with
> > dev_err can result in a large number of error messages during device
> > probe.  On a platform with a serial console this can result in
> > excessively long boot times in a way that looks like an infinite loop
> > when multiple busses are present.  Since 0f183fd151c (net/fsl: enable
> > extended scanning in xgmac_mdio) we perform more scanning so there are
> > potentially more failures.
> > 
> > Reduce the logging level to dev_dbg which is consistent with the
> > Freescale enetc driver.
> 
> Hi Jamie
> 
> Does the system you are using suffer from Errata A011043?

It's the HoneyComb SolidRun (LX2160A) and I can't find an errata list 
for that chip.  It's booting from ACPI in any case so wouldn't have that 
workaround set.

Thanks,

Jamie