Hi Jose, > 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. Besides, "skip_unconfigure" sysfs > entry has been created for testing purposes with these or other devices. > > 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. > > Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@xxxxxxxxxx> > --- > drivers/bluetooth/btusb.c | 6 ++++++ > drivers/usb/core/generic.c | 2 +- > drivers/usb/core/sysfs.c | 36 ++++++++++++++++++++++++++++++++++++ > include/linux/usb.h | 2 ++ > 4 files changed, 45 insertions(+), 1 deletion(-) send this to the USB guys first and get their ACK. Regards Marcel
