Some USB devices need to be put into suspend mode before unplugging. Without CONFIG_USB_SUSPEND we have no way to unplug them safely. Signed-off-by: Yan Li <elliot.li.tech@xxxxxxxxx> --- drivers/usb/core/Kconfig | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig index e1759d1..457ee9d 100644 --- a/drivers/usb/core/Kconfig +++ b/drivers/usb/core/Kconfig @@ -89,18 +89,20 @@ config USB_DYNAMIC_MINORS config USB_SUSPEND bool "USB selective suspend/resume and wakeup" depends on USB && PM + default y help If you say Y here, you can use driver calls or the sysfs "power/level" file to suspend or resume individual USB - peripherals and to enable or disable autosuspend (see - Documentation/usb/power-management.txt for more details). + peripherals and to enable or disable autosuspend. Some USB + devices need to be put into suspend mode before unplugging + (see Documentation/usb/power-management.txt for more details). Also, USB "remote wakeup" signaling is supported, whereby some USB devices (like keyboards and network adapters) can wake up their parent hub. That wakeup cascades up the USB tree, and could wake the system from states like suspend-to-RAM. - If you are unsure about this, say N here. + If you are unsure about this, say Y here. config USB_OTG bool -- 1.5.6.5 -- Li, Yan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
