Hi Hui, > I tried to disable the autosuspend on btusb through the module > parameter enable_autosuspend, this parameter is set to N, but the usb > bluetooth device is still runtime suspended. > $ cat /sys/module/btusb/parameters/enable_autosuspend > N > $ cat /sys/bus/usb/devices/3-10/power/runtime_status > suspended > $ cat /sys/bus/usb/devices/3-10/power/runtime_suspended_time > 65187 > > We already set ".supports_autosuspend = 1" in the usb_driver, this > device will be set autosuspend enabled by usb core, we don't need > to call usb_enable_autosuspend() in the btusb_probe(). Instead if > users set the parameter enable_autosuspend to N, we need to call > usb_disable_autosuspend() in the btusb_probe(). After this change > and set the parameter to N, we could see the device is not runtime > suspended anymore. > $ cat /sys/module/btusb/parameters/enable_autosuspend > N > $ cat /sys/bus/usb/devices/3-10/power/runtime_status > active > $ cat /sys/bus/usb/devices/3-10/power/runtime_suspended_time > 0 > > And if we disable the autosuspend in the btusb_probe(), we need to > enable the autosuspend in the disconnect(), this could guarantee > that the device could be runtime suspended after we rmmod the btusb. > > Signed-off-by: Hui Wang <hui.wang@xxxxxxxxxxxxx> > --- > drivers/bluetooth/btusb.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) patch has been applied to bluetooth-next tree. Regards Marcel
