From: Arnd Bergmann <arnd@xxxxxxxx> Date: Fri, 1 Apr 2011 17:06:36 +0200 > The documentation for the USB ethernet devices suggests that > only some devices are supposed to use usb0 as the network interface > name instead of eth0. The logic used there, and documented in > Kconfig for CDC is that eth0 will be used when the mac address > is a globally assigned one, but usb0 is used for the locally > managed range that is typically used on point-to-point links. > > Unfortunately, this has caused a lot of pain on the smsc95xx > device that is used on the popular pandaboard without an > EEPROM to store the MAC address, which causes the driver to > call random_ether_address(). > > Obviously, there should be a proper MAC addressed assigned to > the device, and discussions are ongoing about how to solve > this, but this patch at least makes sure that the default > interface naming gets a little saner and matches what the > user can expect based on the documentation, including for > new devices. > > The approach taken here is to flag whether a device might be a > point-to-point link with the new FLAG_POINTTOPOINT setting in > the usbnet driver_info. A driver can set both FLAG_POINTTOPOINT > and FLAG_ETHER if it is not sure (e.g. cdc_ether), or just one > of the two. The usbnet framework only looks at the MAC address > for device naming if both flags are set, otherwise it trusts the > flag. > > Signed-off-by: Arnd Bergmann <arnd.bergmann@xxxxxxxxxx> > Tested-by: Andy Green <andy.green@xxxxxxxxxx> Applied, thanks. -- 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
