On 27.10.2021 03:05:53, Vincent Mailhol wrote: > The field dev_port of struct net_device indicates the port number of a > network device [1]. This patch populates this field. > > This field can be helpful to distinguish between the two network > interfaces of a dual channel device (i.e. ES581.4 or ES582.1). Indeed, > at the moment, all the network interfaces of a same device share the > same static udev attributes c.f. output of: > > | udevadm info --attribute-walk /sys/class/net/canX > > The dev_port attribute can then be used to write some udev rules to, > for example, assign a permanent name to each network interface based > on the serial/dev_port pair (which is convenient when you have a test > bench with several CAN devices connected simultaneously and wish to > keep consistent interface names upon reboot). > > [1] https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-class-net > > Suggested-by: Lukas Magel <lukas.magel@xxxxxxxxxxx> > Signed-off-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx> Applied to linux-can-next/testing. Thanks, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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