From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Tue, 22 Aug 2017 23:39:58 +0300
Subject: [PATCH] ACPI: device property: Fix node lookup in
acpi_graph_get_child_prop_value()
References: bnc#1060662
Patch-mainline: 4.12.10
Git-commit: b5212f57da145e53df790a7e211d94daac768bf8
commit b5212f57da145e53df790a7e211d94daac768bf8 upstream.
acpi_graph_get_child_prop_value() is intended to find a child node with a
certain property value pair. The check
if (!fwnode_property_read_u32(fwnode, prop_name, &nr))
continue;
is faulty: fwnode_property_read_u32() returns zero on success, not on
failure, leading to comparing values only if the searched property was not
found.
Moreover, the check is made against the parent device node instead of
the child one as it should be.
Fixes: 79389a83bc38 (ACPI / property: Add support for remote endpoints)
Reported-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/acpi/property.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 9364398204e9..6822ac9f106b 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -1046,7 +1046,7 @@ static struct fwnode_handle *acpi_graph_get_child_prop_value(
fwnode_for_each_child_node(fwnode, child) {
u32 nr;
- if (!fwnode_property_read_u32(fwnode, prop_name, &nr))
+ if (fwnode_property_read_u32(child, prop_name, &nr))
continue;
if (val == nr)
--
2.14.2