From: Rafael J. Wysocki Date: Tue, 18 Jun 2013 22:44:45 +0000 (+0200) Subject: ACPI / PM: Fix error code path for power resources initialization X-Git-Tag: upstream/snapshot3+hdmi~4895^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6ee22e9d59151550a55d370b14109bdae8b58bda;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 Tested-by: Lan Tianyu Signed-off-by: Rafael J. Wysocki Cc: 3.9+ Acked-by: Yasuaki Ishimatsu Reviewed-by: Mika Westerberg --- diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index f962047..288bb27 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);