Hi,
The sh-sci driver uses pm_runtime_get/put_sync() in such a way
that they may be run with interrupts off and cause the (recently
added) might_sleep_if() to trigger in rpm_suspend/resume().
To avoid that, it's necessary to set the SCI device's power.irq_safe
flag to indicate that it's runtime PM callbacks may be executed with
interrupts off safely. However, the sh-sci driver needs to be able to
clear that flag sometimes, so a new runtime PM helper for doing that
is needed.
[1/2] - Add pm_runtime_irq_unsafe() for clearing the power.irq_safe device flag.
[2/2] - Make sh-sci use power.irq_safe to indicate that runtime PM callbacks
may be run with interrupts off.
Thanks,
Rafael
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