On Tue, 12 Oct 2010, Dmitry Shmidt wrote: > On Tue, Oct 12, 2010 at 10:50 AM, Nicolas Pitre <nico@xxxxxxxxxxx> wrote: > >> Imagine your device is keeping connection during suspend. You got packet - > >> wlan will wake application processor > >> through external irq line and linux starts resume. You can not find wlan > >> card again - it is too slow. > > > > What? I'm not following you anymore. > > > > The Libertas firmware can be configured to filter incoming packets and > > only assert the IRQ signal only when a specific packet comes in, just > > like wake-on-LAN for Ethernet devices. > > This is not an issue of the ability to handle packets, but to handle > them quickly. > This is important for VoIP for example. If you need to recognize > device each time you are coming from suspend - > it is not a good idea sometimes. I simply don't see why you'd want to suspend while a VoIP session is active then. Those methods you want to inhibit are meant for long term deep suspending, not for inter-packet power saving during a call. Nicolas
