Unknown filesystem type

[phodina]

Hi,
I'm attempting to debug modem crashes on the SDM845 qcom SoC on the akatsuki platform (Sony Xperia XZ3).

When running the commands from the README I get this error

groot:~$ zcat /proc/config.gz | grep CONFIG_CONFIGFS_FS
CONFIG_CONFIGFS_FS=y
groot:~$ zcat /proc/config.gz | grep CONFIG_USB_CONFIGFS_F_FS
CONFIG_USB_CONFIGFS_F_FS=y
groot:~$ ls /dev/ffs-diag/ -al
total 0
drwxr-xr-x    2 root     root            40 Jan 22 17:08 .
drwxr-xr-x   17 root     root          4460 Jan 22 17:08 ..
groot:~$ sudo mount -t functionfs diag /dev/ffs-diag
mount: /dev/ffs-diag: unknown filesystem type 'functionfs'.
       dmesg(1) may have more information after failed mount system call.

Any idea what might be missing in the kernel or what's the cause?

[konradybcio]

You need CONFIG_USB_F_FS