Messages in this thread | ![/](/images/icornerl.gif) | | From | "Rafael J. Wysocki" <> | Subject | [PATCH 0/2 v2] sh-sci / PM: Fix problem with runtime PM callbacks run with interrupts off | Date | Sun, 21 Aug 2011 21:09:30 +0200 |
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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.
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.
Thanks, Rafael
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