Messages in this thread | | | Date | Mon, 2 Dec 2013 01:02:40 +0100 | Subject | Re: [PATCH v2 2/3] bq2415x_charger: Use power_supply notifier for automode | From | Michael Trimarchi <> |
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Hi Anton
On Sun, Dec 1, 2013 at 11:37 PM, Anton Vorontsov <anton@enomsg.org> wrote: > On Mon, Nov 25, 2013 at 08:16:34PM +0100, Michael Trimarchi wrote: > ... >> >> So you can read this value without any type of synchronization >> >> with the power_supply_core >> >> and sysfs implementation? > ... >> https://lists.ubuntu.com/archives/kernel-team/2013-January/025206.html >> >> I found and equivalent scenario that I was trying to said > > That's a good question, actually. Even though in Pali's case the notifier > is atomic (so that we are pretty confident that the object won't be > unregistered), there is still a possiblity of a dead lock, for example. So
So if the get_property is a sleeping function it will be a deadlock. Right?
Michael
> notifiers should be careful to not hold any locks, because the other > driver might call get_property(), which might acquire locks. > > Thanks, > > Anton
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