Re: 4.5.0 on sun7i-a20-olinuxino-lime2: libphy: PHY stmmac-0:ffffffff not found (regression from rc7)

Giuseppe, Alexandre, et al.,

On Thu, Mar 17, 2016 at 8:52 AM, Marc Zyngier [off-list ref] wrote:

On Thu, 17 Mar 2016 00:56:40 +0100
Bert Lindner [off-list ref] wrote:

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On 2016-03-16 18:42, Marc Zyngier wrote:

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On 16/03/16 15:10, Bert Lindner wrote:

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On 2016-03-16 14:10, Andreas Färber wrote:

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Am 16.03.2016 um 13:09 schrieb Robin Murphy:

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On 16/03/16 11:39, Marc Zyngier wrote:

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On 16/03/16 11:19, Bert Lindner wrote:

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For the board sun7i-a20-olinuxino-lime2, there seems to be a problem
with the eth0 PHY in mainline kernel 4.5.0 that developed since
4.5.0-rc7. Ethernet does not work, although eth0 is reported:

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[    9.767125] NET: Registered protocol family 10
[   10.357405] libphy: PHY stmmac-0:ffffffff not found
[   10.362382] eth0: Could not attach to PHY
[   10.366557] stmmac_open: Cannot attach to PHY (error: -19)

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v4 fixes for 4.5 are here:

https://patchwork.ozlabs.org/patch/598195/ (revert)
https://patchwork.ozlabs.org/patch/598196/

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Good to know, thanks. Could you also give the potential fix a go (as
mentioned by Andreas)? Just to make sure that whatever gets merged next
will actually fix the issue.

Yes sure, it took a while because I had to travel. Confirmed, the
v4-for-4.5 fix works well for me, on sun7i-a20-olinuxino-lime2:

root@lime2-079f:~# cat /proc/version
Linux version 4.5.0-598195-598196-v4 (root@lime2-079f) (gcc version
4.9.1 (Ubuntu/Linaro 4.9.1-16ubuntu6) ) #1 SMP Wed Mar 16 16:44:22 UTC 2016

dmesg:
[    8.245273] NET: Registered protocol family 10
[    9.297406]  RX IPC Checksum Offload disabled
[    9.297460]  No MAC Management Counters available
[    9.297951] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   16.285658] sun7i-dwmac 1c50000.ethernet eth0: Link is Up -
1Gbps/Full - flow control rx/tx
[   16.285798] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

The board is connected to my laptop rather than to a switch, so that
might be where the flow control message comes from (not sure). Anyway
ethernet works.

Cool, many thanks for taking the time to test and report.

Hopefully Giuseppe will get this merged quickly enough in mainline, and
it should then trickle into a 4.5-stable release (cc-ing stable on
these patches would probably be a good idea, BTW).

stmmac is broken on at least Lime2, BananaPi and Cubieboard2 since
v4.5 [0], including all five stable releases :(
The v4.5 patches quoted above are already +4 weeks old, could we
please get them into stable?

Thanks!
Andre

[0] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823493