[linux-usb-devel] [PATCH 1/3] UEAGLE : be suspend friendly
stern at rowland.harvard.edu
Fri Oct 6 14:20:42 EDT 2006
On Fri, 6 Oct 2006, Duncan Sands wrote:
> > Maybe UEAGLE can do something a little more sensible...
> What is the modem supposed to do if it receives a packet to
> transmit after it has been told to suspend? This is a real
> question, I'm not pretending! I've never thought about or
> read about suspend/resume and have no idea how it is supposed
> to work. Should it just reject it, or should it wake the
> modem up?
It depends on the context in which the modem was suspended. If this was a
regular system sleep transition, or some other suspend request coming from
outside the driver, then packets should be dropped.
But if the suspend originated within the driver itself, as a power-saving
measure while the connection was idle, then new packets should cause the
driver to wake the modem up. That is, self-originated suspends should be
transparent. Outside-originated suspends are someone else's problem.
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