On Thu, Jan 27, 2022 at 12:13:53PM +0100, Greg KH wrote: > On Thu, Jan 27, 2022 at 12:07:42PM +0100, Oleksij Rempel wrote: > > The weakest link of usbnet devices is the USB cable. > > The weakest link of any USB device is the cable, why is this somehow > special to usbnet devices? > > > Currently there is > > no way to automatically detect cable related issues except of analyzing > > kernel log, which would differ depending on the USB host controller. > > > > The Ethernet packet counter could potentially show evidence of some USB > > related issues, but can be Ethernet related problem as well. > > > > To provide generic way to detect USB issues or HW issues on different > > levels we need to make use of devlink. > > Please make this generic to all USB devices, usbnet is not special here > at all. Even more basic question: How is the kernel supposed to tell the difference between a USB issue and a HW issue? That is, by what criterion do you decide which category a particular issue falls under? Alan Stern
