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> --- drivers/net/can/usb/etas_es58x/es58x_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c index 96a13c770e4a..403de7e9d084 100644 --- a/drivers/net/can/usb/etas_es58x/es58x_core.c +++ b/drivers/net/can/usb/etas_es58x/es58x_core.c @@ -2096,6 +2096,7 @@ static int es58x_init_netdev(struct es58x_device *es58x_dev, int channel_idx) netdev->netdev_ops = &es58x_netdev_ops; netdev->flags |= IFF_ECHO; /* We support local echo */ + netdev->dev_port = channel_idx; ret = register_candev(netdev); if (ret) -- 2.32.0
