Hi all, It seems that any time the rtl8187 driver is detached from an rtl8187 interface, a USB device reset is triggered. This is not a problem in the general case, but when working with libusb, calling libusb_detach_kernel_driver (https://libusb.sourceforge.io/api-1.0/group__libusb__dev.html#ga5e0cc1d666097e915748593effdc634a) results in the device reset, which then causes the kernel driver to re-attach to the device. This prevents, for example, forwarding the device into a VM using QEMU/KVM. This seems to be due to rtl8187_disconnect calling usb_reset_device. The 8187 driver seems to be the only realtek driver unconditionally resetting on disconnect -- is this technically necessary? I'm not sure I would call this a bug, but it's definitely behavior that was very puzzling to me and I only understood after enough debugging to start reading kernel source. David -- David Tomaschik https://systemoverlord.com david@xxxxxxxxxxxxxxxxxx 7FD5 8D9A 196D CEEE AD67 1F94 F4D7 A791 5DEA 789B
