netdev - Re: [PATCH net] dsa: mv88e6xxx: Ensure all pending interrupts are handled prior to exit

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Date:   Tue, 12 Feb 2019 13:56:44 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     John David Anglin <dave.anglin@...l.net>,
        Russell King <linux@....linux.org.uk>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net] dsa: mv88e6xxx: Ensure all pending interrupts are
 handled prior to exit

On Tue, Feb 12, 2019 at 07:51:05AM +0100, Heiner Kallweit wrote:
> On 12.02.2019 04:58, Andrew Lunn wrote:
> >>> Hi David
> >>>
> >>> I just tested this on one of my boards. It loops endlessly:
> >>>
> >>> [   47.173396] mv88e6xxx_g1_irq_thread_work: c881 a8 80                         
> >>> [   47.182108] mv88e6xxx_g1_irq_thread_work: c881 a8 80                         
> >>> [   47.190820] mv88e6xxx_g1_irq_thread_work: c881 a8 80                         
> >>> [   47.199535] mv88e6xxx_g1_irq_thread_work: c881 a8 80                         
> >>> [   47.208254] mv88e6xxx_g1_irq_thread_work: c881 a8 80   
> >>>
> >>> These are reg, ctl1, reg & ctl1.
> >>>
> >>> So there is an unhandled device interrupt.
> > 
> > Hi Heiner
> > 
> > Your patch Fixes: 2b3e88ea6528 ("net: phy: improve phy state
> > checking") is causing me problems with interrupts for the Marvell
> > switches.
> > 
> Hi Andrew,
> 
> what kernel version is it?

It is a little bit old, 5.0-rc1 net-next. I should rebase and
retest. I'm testing on a ZII board which is not fully in mainline So i
need some patches.

> And the PHY driver in use is "Marvell 88E6390" ?

Yes, the marvell 1G driver.

     Andrew