On Sat, Jan 05, 2019 at 11:28:19AM +0800, Yunsheng Lin wrote: > On 2018/12/17 22:36, Russell King - ARM Linux wrote: > > I'll try to do further diagnosis over Christmas in case I've missed > > something, but I suspect it may be one of those "weird behaviour" issues > > where the safest action is to disable pause mode as per my commit - > > which is far saner than having mismatched pause status on either end > > of a link. However, given that Marvell specs are all NDA-only, it's > > very difficult to investigate beyond "this is the observed behaviour". > > Hi, > > Is there any update on the further diagnosis?
Hi, I've finally been able to do some further diagnosis (with a 'scope). It would appear that the network adapter had PHY polling enabled, which meant that it overwrote the PHYs advertisement register during negotiation. I thought I'd checked that scenario, but alas clearing the PHY poll enable bit on its own doesn't stop it polling! I'll send a revert for the commit shortly. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
