From: Kay Sievers <kay.sievers@suse.de>
Date: Thu, 4 Aug 2005 23:52:57 +0000 (+0200)
Subject: read sysfs attribute also from parent class device
X-Git-Tag: 174~2655
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=738428b4499211247dafa394805ecaa2cb313f03

read sysfs attribute also from parent class device

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
---

diff --git a/udev_rules.c b/udev_rules.c
index 6a485f08a..d86b8e859 100644
--- a/udev_rules.c
+++ b/udev_rules.c
@@ -295,6 +295,7 @@ static int find_free_number(struct udevice *udev, const char *name)
 static int find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device,
 				const char *name, char *value, size_t len)
 {
+	struct sysfs_class_device *class_dev_parent;
 	struct sysfs_attribute *tmpattr;
 
 	dbg("look for device attribute '%s'", name);
@@ -303,6 +304,12 @@ static int find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sys
 		tmpattr = sysfs_get_classdev_attr(class_dev, name);
 		if (tmpattr)
 			goto attr_found;
+		class_dev_parent = sysfs_get_classdev_parent(class_dev);
+		if (class_dev_parent) {
+			tmpattr = sysfs_get_classdev_attr(class_dev_parent, name);
+			if (tmpattr)
+				goto attr_found;
+		}
 	}
 	if (sysfs_device) {
 		dbg("look for devices attribute '%s/%s'", sysfs_device->path, name);