[Bug 263783] USB MBIM: Support for LTE/4G USB modems (MBIM)

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 29 Oct 2022 12:36:40 UTC

hendrik@0x00.to changed:

           What    |Removed                     |Added
                 CC|                            |hendrik@0x00.to

--- Comment #12 from hendrik@0x00.to ---
Same issue here using a Sierra Wireless EM7565.
After some research I actually found a way to "detach" a device using the
"set_config 255" flag for usbconfig:

> The special value of 255 unconfigures the device, detaching the interface drivers and reducing the power consumption to minimum, but without going into power saving mode or detaching from the bus.

I'm now able to load the kernel module without a crash (kldload if_umb) however
no new network interface umb0 is created. "show_ifdrv" also shows no driver
usbconfig also provides a "detach_kernel_driver" flag:

> Detach kernel driver for the selected interface and USB device.

Using this the kernel still crashes.

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