On Tue, Feb 12, 2019 at 07:51:05AM +0100, Heiner Kallweit wrote:

On 12.02.2019 04:58, Andrew Lunn wrote:

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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