sysdev_suspend — Suspend all system devices.
int sysdev_suspend ( | pm_message_t state); |
We perform an almost identical operation as sysdev_shutdown
above, though calling ->suspend instead. Interrupts are disabled
when this called. Devices are responsible for both saving state and
quiescing or powering down the device.
This is only called by the device PM core, so we let them handle all synchronization.