Fwd: Marvell Kirkwood TS41x GMAC losing connection

+ ThomasP, lakml

On Fri, Jan 29, 2016 at 09:07:00PM +0100, Thomas Schl?ter wrote:

Dear ARM Kirkwood Maintainers,

I tried to post the message below to the linux-arm-kernel mailing list with no success as my mail gets greylisted due to some ?suspicion? I cannot understand. Obviously the list moderator has gone to lunch for a long time, so please excuse that I contact you directly.

quoted

Anfang der weitergeleiteten Nachricht:

Von: Thomas Schl?ter [off-list ref]
Betreff: Marvell Kirkwood TS41x GMAC losing connection
Datum: 18. Januar 2016 um 21:22:54 MEZ
An: linux-arm-kernel at lists.infradead.org

Hello,

I am using a kernel 4.3 on a QNAP TS-412 (Kirkwood/mvebu TS41x 8261).

After less than one hour of using the system, I am losing the network connection on the Marvell GMAC interface. In syslog, I can see some services complaining "write: No buffer space available".
When I hook up a USB keyboard and bring the interface down and up again, it works again for some minutes before it crashes again.

During bootup, I see the following messages:

[    9.183115] mv643xx_eth: MV-643xx 10/100/1000 ethernet driver version 1.4
[    9.190408] kirkwood-pinctrl f1010000.pin-controller: pin PIN20 already requested by f1080000.sata; cannot claim for f1076000.ethernet-controller
[    9.203553] kirkwood-pinctrl f1010000.pin-controller: pin-20 (f1076000.ethernet-controller) status -22
[    9.212920] kirkwood-pinctrl f1010000.pin-controller: could not request pin 20 (PIN20) from group mpp20  on device f1010000.pin-controller
[    9.225419] mv643xx_eth f1076000.ethernet-controller: Error applying setting, reverse things back
[   10.318914] mv643xx_eth_port mv643xx_eth_port.0 eth0: port 0 with MAC address 00:50:89:12:34:56
[   11.434761] mv643xx_eth_port mv643xx_eth_port.1 eth1: port 0 with MAC address 00:00:00:00:00:00
[   40.663969] mv643xx_eth_port mv643xx_eth_port.0 eth0: link up, 1000 Mb/s, full duplex, flow control disabled

Is it possible that there is a problem with the device tree resulting in a hardware pin of the GMAC being erroneously routed to the SATA port?
Indeed, the system and network has been stable from flash / initrd until I put it some hard disks.

Thanks in advance.

Regards,
Thomas