netdev - PA Semi PWRficient Gigabit Ethernet doesn't work anymore since the first networking updates for the kernel 4.16

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Message-ID: <9e8e906d-b2b7-f11c-30ed-ccdf91ac563c@xenosoft.de>
Date:   Sun, 4 Feb 2018 17:47:03 +0100
From:   Christian Zigotzky <chzigotzky@...osoft.de>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: PA Semi PWRficient Gigabit Ethernet doesn't work anymore since the
 first networking updates for the kernel 4.16

Hello,

The PA Semi PWRficient Gigabit Ethernet doesn't work anymore since the 
first networking updates [1] for the kernel 4.16.

Error messages:

[    0.634241] libphy: pasemi gpio mdio bus: probed
[    0.634749] pasemi gpio mdio bus: Cannot register as MDIO bus, err -38
[    2.311496] pasemi_mac 0000:00:14.0: runtime IRQ mapping not provided 
by arch
[    2.311554] pasemi_mac 0000:00:14.1: runtime IRQ mapping not provided 
by arch
[    2.311599] pasemi_mac 0000:00:14.2: runtime IRQ mapping not provided 
by arch
[    2.311641] pasemi_mac 0000:00:14.3: runtime IRQ mapping not provided 
by arch
[    2.312276] pasemi_mac 0000:00:15.0: runtime IRQ mapping not provided 
by arch
[    2.312903] pasemi_mac 0000:00:15.1: runtime IRQ mapping not provided 
by arch
[    3.817420] i2c-pasemi 0000:00:1c.0: runtime IRQ mapping not provided 
by arch
[    3.817616] i2c-pasemi 0000:00:1c.1: runtime IRQ mapping not provided 
by arch
[    3.817809] i2c-pasemi 0000:00:1c.2: runtime IRQ mapping not provided 
by arch
[    4.299984] pasemi_edac 0000:00:04.0: runtime IRQ mapping not 
provided by arch
[    4.300281] pasemi_edac 0000:00:05.0: runtime IRQ mapping not 
provided by arch
[   39.633565] pasemi_mac 0000:00:14.3: PHY init failed: -19.
[   39.633569] pasemi_mac 0000:00:14.3: Defaulting to 1Gbit full duplex

I figured out that the problematic code is in the mdio bus changes of 
the networking updates. [1]

I found the problematic code in the file 'drivers/net/phy/mdio_bus.c'. I 
created a patch which solves the problem with the PA Semi PWRficient 
Gigabit Ethernet. (attached)

Could you please check the changes in the file 'drivers/net/phy/mdio_bus.c'?

Thanks,
Christian

[1] 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b2fe5fa68642860e7de76167c3111623aa0d5de1

View attachment "mdio_bus.patch" of type "text/x-patch" (1053 bytes)