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read sysfs attribute also from parent class device

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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
Kay Sievers
2005-08-05 01:52:57 +02:00
parent 52dbd80e78
commit 738428b449
1 changed files with 7 additions and 0 deletions
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udev_rules.c
+7
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@@ -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);