Hi,
On Fri, 2013-12-06 at 12:27 +0800, Guoqiang Liu wrote:
> From: "guoqiang.liu" <[email protected]>
>
> Gadget technology will not update despite gadget interface state
> changed. at the same times, the gadget interface will not up/down
> even enable/disable gadget technology.
>
> Here initiative up/down the interface when enable/disable gadget
> technology, and monitor rtnl message to update gadget technology
> power state.
Ethernet works such that it detects a carrier signal, i.e. the ethernet
cable is connected to another device, and therefore enables the device
in response. Devices of other technologies don't have such properties
and therefore do not get enabled automatically.
I think this patch intends to do the same as ethernet for USB gadget
interfaces when a cable is connected. Unfortunately this patch will
always enable the USB gadget interface whenever the kernel module is
loaded, also without a cable connected. So there is a difference in how
USB works, I don't know for sure whether USB gadget reporting interface
up without a cable connected is a bug or an intended feature.
In cases where PersistentTetheringMode is set, merely loading a kernel
module will cause gadget to start tethering and looks somewhat silly
without a cable attached. This needs some more thinking, does anyone
have any useful insights into this matter?
Cheers,
Patrik
_______________________________________________
connman mailing list
[email protected]
https://lists.connman.net/mailman/listinfo/connman
