Isn't a driver that's not switching to altsetting 0 in its suspend() buggy?
No. When the device resumes it will be in the same altsetting as it was when it suspended. The driver doesn't need to switch altsettings.
Then we must refuse any sleep states that want to power down the bus.
No, if the bus powers off the call sequence seen by that driver will be suspend()->disconnect() rather than suspend()->resume().
That's a completely routine operation, like unplugging something while it's suspended. You want to tell folk they can't suspend their laptop and THEN unplug all devices/cables?
- Dave
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