This is a note to let you know that I've just added the patch titled
ACPI / scan: Annotate physical_node_lock in acpi_scan_is_offline()
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-scan-annotate-physical_node_lock-in-acpi_scan_is_offline.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4c533c801d1c9b5c38458a0e7516e0cf50643782 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx>
Date: Sat, 18 Apr 2015 01:25:46 +0200
Subject: ACPI / scan: Annotate physical_node_lock in acpi_scan_is_offline()
From: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx>
commit 4c533c801d1c9b5c38458a0e7516e0cf50643782 upstream.
acpi_scan_is_offline() may be called under the physical_node_lock
lock of the given device object's parent, so prevent lockdep from
complaining about that by annotating that instance with
SINGLE_DEPTH_NESTING.
Fixes: caa73ea158de (ACPI / hotplug / driver core: Handle containers in a special way)
Reported-and-tested-by: Xie XiuQi <xiexiuqi@xxxxxxxxxx>
Reviewed-by: Toshi Kani <toshi.kani@xxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/scan.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -192,7 +192,11 @@ bool acpi_scan_is_offline(struct acpi_de
struct acpi_device_physical_node *pn;
bool offline = true;
- mutex_lock(&adev->physical_node_lock);
+ /*
+ * acpi_container_offline() calls this for all of the container's
+ * children under the container's physical_node_lock lock.
+ */
+ mutex_lock_nested(&adev->physical_node_lock, SINGLE_DEPTH_NESTING);
list_for_each_entry(pn, &adev->physical_node_list, node)
if (device_supports_offline(pn->dev) && !pn->dev->offline) {
Patches currently in stable-queue which might be from rafael.j.wysocki@xxxxxxxxx are
queue-3.14/acpi-scan-annotate-physical_node_lock-in-acpi_scan_is_offline.patch
queue-3.14/acpica-utilities-split-io-address-types-from-data-type-models.patch
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