On Tue, 16 Apr 2013, linux fddl wrote: > I am a new fish of linux usb host driver developper. > Recently, when developping the host's PM function, I found that usb's > remote wakeup relys on CONFIG_USB_SUSPEND. I do not know why we need > such a restriction. > Is it means if a usb host driver without the implementation of runtime > suspend also can not(should not) support remote wakeup? > Anyone would like to give me some help? You are right; kernels built without runtime suspend also do not support USB remote wakeup. The reason is historical; the two features were added at the same time and they shared the same implementation. The situation will be different starting in the 3.10 kernel. USB remote wakeup will be supported whenever CONFIG_PM is enabled. Alan Stern -- 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
