On Mon, May 02, 2022 at 09:07:58AM +0200, Jose Ignacio Tornos Martinez wrote: > Bluetooth Dongles with CSR chip (i.e. USB Bluetooth V4.0 Dongle by > Trust) hang when they are unbound from 'unbind' sysfs entry and > can not be bound again. > > The reason is CSR chip hangs when usb configuration command with > index 0 (used to unconfigure) is sent during disconnection. > > To avoid this unwanted result, it is necessary not to send this > command for CSR chip when usb device is unbound, so a new quirk > has been created for this device. > > Athough device is not unconfigured, it is better to avoid device > hanging to be able to operate. Even bluetooth can be previously > turned off. > On the other hand, this is not important if usb device is going to > be bound again (normal behavior), i.e. with usbip. > --- Also, the subject is totally wrong :(
