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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-19 00:44:45 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-20 00:47:55 +0200
commit6ee22e9d59151550a55d370b14109bdae8b58bda (patch)
treea696cfa46f84f84cf38c44f8212d32f2f940063a
parent8112006f41fd76ddf4988f8ddd904563db85613c (diff)
downloadlinux-linaro-stable-6ee22e9d59151550a55d370b14109bdae8b58bda.tar.gz
ACPI / PM: Fix error code path for power resources initialization
Commit 781d737 (ACPI: Drop power resources driver) introduced a bug in the power resources initialization error code path causing a NULL pointer to be referenced in acpi_release_power_resource() if there's an error triggering a jump to the 'err' label in acpi_add_power_resource(). This happens because the list_node field of struct acpi_power_resource has not been initialized yet at this point and doing a list_del() on it is a bad idea. To prevent this problem from occuring, initialize the list_node field of struct acpi_power_resource upfront. Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Lan Tianyu <tianyu.lan@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: 3.9+ <stable@vger.kernel.org> Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
-rw-r--r--drivers/acpi/power.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index f962047c6c85..288bb270f8ed 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -885,6 +885,7 @@ int acpi_add_power_resource(acpi_handle handle)
ACPI_STA_DEFAULT);
mutex_init(&resource->resource_lock);
INIT_LIST_HEAD(&resource->dependent);
+ INIT_LIST_HEAD(&resource->list_node);
resource->name = device->pnp.bus_id;
strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_POWER_CLASS);