scsi_id, usb_id: request device parent by subsystem

[elogind.git] / udev_sysfs.c

diff --git a/udev_sysfs.c b/udev_sysfs.c
index 983837980338e8de0a219b991063689188f08413..172f0ce1fdd4b3e95999c4f9f5c1ee0043c9bdd4 100644 (file)
--- a/udev_sysfs.c
+++ b/udev_sysfs.c
@@ -306,6 +306,19 @@ device_link:
        return sysfs_device_get(parent_devpath);
 }
 
+struct sysfs_device *sysfs_device_get_parent_with_subsystem(struct sysfs_device *dev, const char *subsystem)
+{
+       struct sysfs_device *dev_parent;
+
+       dev_parent = sysfs_device_get_parent(dev);
+       while (dev_parent != NULL) {
+               if (strcmp(dev_parent->subsystem, subsystem) == 0)
+                       return dev_parent;
+               dev_parent = sysfs_device_get_parent(dev_parent);
+       }
+       return NULL;
+}
+
 char *sysfs_attr_get_value(const char *devpath, const char *attr_name)
 {
        char path_full[PATH_SIZE];