On Mon, 27 Apr 2009, Greg KH wrote: > > The host controller device (which is the parent of the root hub device) > > is the best choice. > > But isn't that the same thing as the usb_host device is today? Or am I > totally confused? You're partially confused. :-) Here's an example. On my system, there's an EHCI controller at PCI address 1d.7: /sys/devices/pci0000:00/0000:00:1d.7/ Inside that directory is the root hub: /sys/devices/pci0000:00/0000:00:1d.7/usb1/ But also inside it is the class device directory: /sys/devices/pci0000:00/0000:00:1d.7/usb_host/usb_host1/ The "companion" attribute is currently there, inside usb_host1. But it could easily be moved up to 0000:00:1d.7. So IIUC, Kay would like to remove the usb_host and usb_host1 subdirectories entirely. The symlinks under /sys/class can remain, but their targets would be different. Right now I've got: $ ls -l /sys/class/usb_host/usb_host1 lrwxrwxrwx 1 root root 0 2009-04-27 11:54 /sys/class/usb_host/usb_host1 -> ../../devices/pci0000:00/0000:00:1d.7/usb_host/usb_host1/ After this change the target of the symlink would be ../../devices/pci0000:00/0000:00:1d.7/ Does that clarify the situation? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
