On Tue, 12 Oct 2010, Dmitry Shmidt wrote: > On Tue, Oct 12, 2010 at 11:13 AM, Nicolas Pitre <nico@xxxxxxxxxxx> wrote: > > 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. > > You are right - there are other ways to resolve some issues. I just > wanted to add another option > that will be kernel-related and not application-related. Even for a kernel related solution, I don't think what you propose is the right thing to do. Nicolas
