[RFT/PATCH] serial: omap: prevent resume if device is not suspended.

On 19 September 2012 17:29, Felipe Balbi [off-list ref] wrote:

this is what I mean, actually. If we remove pm_runtime_get_sync() in
exchange for pm_runtime_set_active() before pm_runtime_enable(), it
works on PandaBoard, but breaks BeagleBoard.

Perhaps it suggests that OMAP4 (PandaBoard) serial port is already
activated but OMAP3 (BeagleBoard) isn't. So we need to reflect that
either by doing pm_runtime_set_active() only on OMAP4 or by bringing
up the OMAP3 too before the pm_runtime_set_active() call.
BTW I understand get_sync(), set_active() and enable() are for
different purposes, they can't be traded for one another.