From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux PCI <linux-pci@vger.kernel.org>,
Linux PM list <linux-pm@vger.kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Toshi Kani <toshi.kani@hp.com>
Subject: Re: [PATCH] ACPI / PM: Hold acpi_scan_lock over system PM transitions
Date: Tue, 20 Aug 2013 14:08:33 +0300 [thread overview]
Message-ID: <20130820110833.GZ4898@intel.com> (raw)
In-Reply-To: <2852781.TfChGuuEkJ@vostro.rjw.lan>
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.
next prev parent reply other threads:[~2013-08-20 11:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-19 23:47 [PATCH] ACPI / PM: Hold acpi_scan_lock over system PM transitions Rafael J. Wysocki
2013-08-20 11:08 ` Mika Westerberg [this message]
2013-08-20 12:24 ` Rafael J. Wysocki
2013-08-20 22:02 ` Toshi Kani
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