netdev - RE: DPAA Ethernet traffice troubles with Linux kernel

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Message-ID: <DB3PR0402MB38492999533EB4400DED45BFECE90@DB3PR0402MB3849.eurprd04.prod.outlook.com>
Date:   Wed, 17 Jan 2018 14:11:36 +0000
From:   Madalin-cristian Bucur <madalin.bucur@....com>
To:     Joakim Tjernlund <Joakim.Tjernlund@...inera.com>,
        "andrew@...n.ch" <andrew@...n.ch>
CC:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "madskateman@...il.com" <madskateman@...il.com>
Subject: RE: DPAA Ethernet traffice troubles with Linux kernel

> -----Original Message-----
> From: Joakim Tjernlund [mailto:Joakim.Tjernlund@...inera.com]
> Sent: Tuesday, January 16, 2018 7:58 PM
> To: andrew@...n.ch
> Subject: Re: DPAA Ethernet traffice troubles with Linux kernel
> 
> On Thu, 1970-01-01 at 00:00 +0000, Andrew Lunn wrote:
> >
> > Hi Joakim
> >
> > You appear to be using an old kernel. Take a look at:
> 
> Not really, I am using 4.14.x and I don't think that is old. Seems like
> this
> patch hasn't been sent to 4.14.x.
> 
> I wonder if I might be missing something else, we just moved to 4.14 and
> notic that all
> our fixed PHYs are non functioning:
> fsl_mac ffe4e2000.ethernet: FMan MEMAC
> fsl_mac ffe4e2000.ethernet: FMan MAC address: 00:06:9c:0b:06:20
> fsl_mac dpaa-ethernet.0: __devm_request_mem_region(mac) failed
> fsl_mac: probe of dpaa-ethernet.0 failed with error -16
> fsl_mac ffe4e4000.ethernet: FMan MEMAC
> fsl_mac ffe4e4000.ethernet: FMan MAC address: 00:06:9c:0b:06:21
> fsl_mac dpaa-ethernet.1: __devm_request_mem_region(mac) failed
> fsl_mac: probe of dpaa-ethernet.1 failed with error -16
> fsl_mac ffe4e6000.ethernet: FMan MEMAC
> fsl_mac ffe4e6000.ethernet: FMan MAC address: 00:06:9c:0b:06:22
> fsl_mac dpaa-ethernet.2: __devm_request_mem_region(mac) failed
> fsl_mac: probe of dpaa-ethernet.2 failed with error -16
> fsl_mac ffe4e8000.ethernet: FMan MEMAC
> fsl_mac ffe4e8000.ethernet: FMan MAC address: 00:06:9c:0b:06:23
> fsl_mac dpaa-ethernet.3: __devm_request_mem_region(mac) failed
> fsl_mac: probe of dpaa-ethernet.3 failed with error -16
> 
> Feels like FMAN still think there are real PHYs there ?

Hi Joakim,

These errors are issued when trying to probe the second time the same
MAC node. The issue was introduced by this commit:

commit 4d8ee1935bcd666360311dfdadeee235d682d69a
Author: Florian Fainelli <f.fainelli@...il.com>
Date: Tue Aug 22 15:24:47 2017 -0700
fsl/man: Inherit parent device and of_node

and was later addressed by this patch set:

http://patchwork.ozlabs.org/project/netdev/list/?series=8462&state=*

Even with these errors printed, all is working fine, it's just the
second probing that fails. Adding the latter patches or reverting
the one above makes the errors prints dissapear.

Madalin