can interface doesn't create in my system

[iDoka]

$ cat /etc/redhat-release 
CentOS Linux release 7.9.2009 (Core)

$ uname -a
Linux 4.15.7-1.el7.elrepo.x86_64 #1 SMP Wed Feb 28 14:38:13 EST 2018 x86_64 x86_64 x86_64 GNU/Linux

Step to reproduce (the kernel supplied with mainline gs_usb.ko):

git clone https://github.com/HubertD/socketcan_gs_usb
cd socketcan_gs_usb
make 
sudo rmmod gs_usb
sudo modprobe can_dev 
sudo modprobe can
sudo insmod ./gs_usb.ko
lsmod | grep gs_usb
  gs_usb                 16384  0
lsmod | grep can
  can_dev                28672  0 
  slcan                  16384  0 
  can_raw                20480  0 
  can                    24576  1 can_raw

after that a run tail -f /var/log/messages and connect dongle:

Jul 11 23:52:23 doka kernel: usb 1-5.4.1: new full-speed USB device number 60 using xhci_hcd
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: device descriptor read/64, error -32
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: device descriptor read/64, error -32
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: new full-speed USB device number 61 using xhci_hcd
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: New USB device found, idVendor=1d50, idProduct=606f
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: Product: cantact gs_usb
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: Manufacturer: cantact.io
Jul 11 23:52:23 doka kernel: usb 1-5.4.1: SerialNumber: 000500125746430120333932

it's all. Nothing else. In output ip a I'm also cannot find canX

---

For reference it's output of tail -f /var/log/messages for mainline gs_usb.ko:

Jul 12 18:13:13 doka kernel: usb 1-5.4.1: new full-speed USB device number 71 using xhci_hcd
Jul 12 18:13:13 doka kernel: usb 1-5.4.1: New USB device found, idVendor=1d50, idProduct=606f
Jul 12 18:13:13 doka kernel: usb 1-5.4.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jul 12 18:13:13 doka kernel: usb 1-5.4.1: Product: cantact gs_usb
Jul 12 18:13:13 doka kernel: usb 1-5.4.1: Manufacturer: cantact.io
Jul 12 18:13:13 doka kernel: usb 1-5.4.1: SerialNumber: 000500125746430120333932
Jul 12 18:13:13 doka kernel: gs_usb 1-5.4.1:1.0: Configuring for 1 interfaces
Jul 12 18:13:13 doka NetworkManager[1390]: <info>  [1626102793.3588] manager: (can0): new Generic device (/org/freedesktop/NetworkManager/Devices/18)

After run ip a I can see can0 interface (for mainline /usr/lib/modules/4.15.7-1.el7.elrepo.x86_64/kernel/drivers/net/can/usb/gs_usb.ko).

For reference (mainline gs_usb.ko):

lsmod | grep gs_usb
  gs_usb                 20480  0 
  can_dev                28672  1 gs_usb

It looks like issue with "linking" between gs_usb and can_dev in case of using custom gs_usb ?