Messages in this thread | | | Date | Tue, 20 Aug 2013 14:08:33 +0300 | From | Mika Westerberg <> | Subject | Re: [PATCH] ACPI / PM: Hold acpi_scan_lock over system PM transitions |
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On Tue, Aug 20, 2013 at 01:47:57AM +0200, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > > Bad things happen if ACPI hotplug events are handled during system > PM transitions, especially if devices are removed as a result. > To prevent those bad things from happening, acquire acpi_scan_lock > when a transition is started and release it when that transition > is complete or has been aborted. > > This fixes resume lockup on my test-bed Acer Aspire S5 that happens > when Thunderbolt devices are disconnected from the machine while > suspended. > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
I tested this on Intel DZ77RE-75K and after the patch is applied the machine didn't hang anymore once resuming.
Feel free to add my tested-by.
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