6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Celeste Liu uwu@coelacanthus.name
commit a12f0bc764da3781da2019c60826f47a6d7ed64f upstream.
The gs_usb driver supports USB devices with more than 1 CAN channel. In old kernel before 3.15, it uses net_device->dev_id to distinguish different channel in userspace, which was done in commit acff76fa45b4 ("can: gs_usb: gs_make_candev(): set netdev->dev_id"). But since 3.15, the correct way is populating net_device->dev_port. And according to documentation, if network device support multiple interface, lack of net_device->dev_port SHALL be treated as a bug.
Fixes: acff76fa45b4 ("can: gs_usb: gs_make_candev(): set netdev->dev_id") Cc: stable@vger.kernel.org Signed-off-by: Celeste Liu uwu@coelacanthus.name Link: https://patch.msgid.link/20250930-gs-usb-populate-net_device-dev_port-v1-1-6... Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/can/usb/gs_usb.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -1246,6 +1246,7 @@ static struct gs_can *gs_make_candev(uns
netdev->flags |= IFF_ECHO; /* we support full roundtrip echo */ netdev->dev_id = channel; + netdev->dev_port = channel;
/* dev setup */ strcpy(dev->bt_const.name, KBUILD_MODNAME);