Messages in this thread | | | Subject | Re: [PATCH v3 net-next] net: phy: realtek: read actual speed on rtl8211f to detect downshift | From | Yonglong Liu <> | Date | Thu, 26 Nov 2020 09:15:01 +0800 |
| |
Hi, Russell:
I found this message in kernel log, thanks!
On 2020/11/26 1:07, Russell King - ARM Linux admin wrote: > On Thu, Nov 26, 2020 at 12:57:37AM +0800, Yonglong Liu wrote: >> Hi, Antonio: >> >> Could you help to provide a downshift warning message when this happen? >> >> It's a little strange that the adv and the lpa support 1000M, but >> finally the link speed is 100M. > That is an identifying feature of downshift. > > Downshift can happen at either end of the link, and since we must not > change the "Advertised link modes" since this is what userspace > configured, if a downshift occurs at the local end, then you will get > the ethtool output you provide, where the speed does not agree with > the reported advertisements. > > You should already be getting a warning in the kernel log when this > happens; phy_check_downshift() which is part of the phylib core code > will check this every time the link comes up. You should already > have a message "Downshift occurred ..." in your kernel log. Please > check. >
| |