on 2023/7/30 2:23, Andrew Lunn wrote:
Now i wounder if you are fixing the wrong thing. Maybe you should be fixing the PHY so it does not report up and then down? You say 'very snall intervals', which should in fact be 1 second. So is the PHY reporting link for a number of poll intervals? 1min to 10 minutes? AndrewYes, according to the log records, the phy polls every second, but the link status changes take time. Generally, it takes 10 seconds for the phy to detect link down, but occasionally it takes several minutes to detect link down,
What PHY driver is this?
It is not so clear what should actually happen with auto-neg turned off. With it on, and the link going down, the PHY should react after about 1 second. It is not supposed to react faster than that, although some PHYs allow fast link down notification to be configured.
Have you checked 802.3 to see what it says about auto-neg off and link down detection?
I personally would not suppress this behaviour in the MAC driver. Otherwise you are going to have funny combinations of special cases of a feature which very few people actually use, making your maintenance costs higher.
Andrew
Thanks for your suggestion, We are analyzing this issue in depth.