diff options
| author | Vincent Mailhol <mailhol.vincent@wanadoo.fr> | 2021-10-27 03:05:53 +0900 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-01-05 12:09:00 +0100 |
| commit | e233640cd3034ae65924316a0d95ccacb86ae4bd (patch) | |
| tree | bd38386428dc522faf05f6bedc552fc36ee8737c | |
| parent | decdcaeedce41884d4a5e04b8846271642e09030 (diff) | |
can: etas_es58x: es58x_init_netdev: populate net_device::dev_port
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
Link: https://lore.kernel.org/all/20211026180553.1953189-1-mailhol.vincent@wanadoo.fr
Suggested-by: Lukas Magel <lukas.magel@escrypt.com>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
| -rw-r--r-- | drivers/net/can/usb/etas_es58x/es58x_core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c index 24627ab14626..8508a73d648e 100644 --- a/drivers/net/can/usb/etas_es58x/es58x_core.c +++ b/drivers/net/can/usb/etas_es58x/es58x_core.c @@ -2094,6 +2094,7 @@ 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) |