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    Subject[PATCH 0/2 v2] sh-sci / PM: Fix problem with runtime PM callbacks run with interrupts off

    > 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.

    The previous version of this patchset was not very good as Alan pointed out,
    so hopefully this one will be better.

    [1/2] - Change PM subsys_data lock type into spinlock.
    [2/2] - Make sh-sci use power.irq_safe to indicate that runtime PM callbacks
    may be run with interrupts off.


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      Last update: 2011-08-21 21:13    [W:0.019 / U:7.672 seconds]
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