lkml.org 
[lkml]   [2011]   [Aug]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/2 v2] sh-sci / PM: Fix problem with runtime PM callbacks run with interrupts off
Date
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



\
 
 \ /
  Last update: 2011-08-21 21:13    [from the cache]
©2003-2011 Jasper Spaans