From d6a83f50da40578db6712c341e48fa4bef88fd6e Mon Sep 17 00:00:00 2001
From: Bastien Nocera <hadess@hadess.net>
Date: Thu, 10 Jan 2013 14:23:23 +0100
Subject: [PATCH] udev: Fix device matching in the accelerometer

As we were searching by ID_PATH, it would have been possible
for us to find a sibling device instead of the device we were
looking for.

This fixes device matching on the WeTab with the upstream kernel,
as it was trying to use the "Asus Laptop extra buttons" device
instead of the accelerometer.
(cherry picked from commit 1d010426c01044350b2b32d8b3af5d064f7dfe27)
---
 src/udev/accelerometer/accelerometer.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/src/udev/accelerometer/accelerometer.c b/src/udev/accelerometer/accelerometer.c
index 21f5193..2fea388 100644
--- a/src/udev/accelerometer/accelerometer.c
+++ b/src/udev/accelerometer/accelerometer.c
@@ -257,7 +257,6 @@ int main (int argc, char** argv)
 
         char devpath[PATH_MAX];
         char *devnode;
-        const char *id_path;
         struct udev_enumerate *enumerate;
         struct udev_list_entry *list_entry;
 
@@ -303,18 +302,10 @@ int main (int argc, char** argv)
                 return 1;
         }
 
-        id_path = udev_device_get_property_value(dev, "ID_PATH");
-        if (id_path == NULL) {
-                fprintf (stderr, "unable to get property ID_PATH for '%s'", devpath);
-                return 0;
-        }
-
         /* Get the children devices and find the devnode */
-        /* FIXME: use udev_enumerate_add_match_parent() instead */
         devnode = NULL;
         enumerate = udev_enumerate_new(udev);
-        udev_enumerate_add_match_property(enumerate, "ID_PATH", id_path);
-        udev_enumerate_add_match_subsystem(enumerate, "input");
+        udev_enumerate_add_match_parent(enumerate, dev);
         udev_enumerate_scan_devices(enumerate);
         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
                 struct udev_device *device;