Re: [PATCH v2] PM: Fix dev_pm_put_subsys_data() to not call kfree()while holding device power lock

[Shuah Khan]

On Mon, 2013-05-06 at 12:41 -0700, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> On Mon, May 06, 2013 at 07:04:53PM +0000, Shuah Khan wrote:
> > dev_pm_put_subsys_data() calls kfree() while holding device power lock, when
> > the reference count is 0. Fix it to call kfree() after releasing the lock.
> > 
> > Signed-off-by: Shuah Khan <shuah.kh@xxxxxxxxxxx>
> > Reviewed-by: Pavel Machek <pavel@xxxxxx>
> > Reviewed-by: Rafael Wysocki <rafael.j.wysocki@xxxxxxxxx>
> > ---
> >  drivers/base/power/common.c |    8 +++++---
> >  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> Is this causing a problem now, and it should go into 3.10 and earlier
> kernels (if so, which ones?), or can it just wait until 3.11 as it's
> just a cleanup fix?

It can wait until 3.11. At this point I don't have any evidence that
this is actually causing problems. So please treat this as a cleanup fix
found during code review.

thanks,
-- Shuah

-- 
Shuah Khan Lead Kernel Developer - Open Source Group 
Samsung Research America (Silicon Valley)
shuah.kh@xxxxxxxxxxx | (970) 672-0658
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