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-rw-r--r--udev/lib/libudev-device.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c
index a512537140..8e4360a7f4 100644
--- a/udev/lib/libudev-device.c
+++ b/udev/lib/libudev-device.c
@@ -404,6 +404,22 @@ struct udev_device *udev_device_get_parent(struct udev_device *udev_device)
return udev_device->parent_device;
}
+struct udev_device *udev_device_get_parent_with_subsystem(struct udev_device *udev_device, const char *subsystem)
+{
+ struct udev_device *parent;
+
+ parent = udev_device_get_parent(udev_device);
+ while (parent != NULL) {
+ const char *parent_subsystem;
+
+ parent_subsystem = udev_device_get_subsystem(parent);
+ if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0)
+ break;
+ parent = udev_device_get_parent(parent);
+ }
+ return parent;
+}
+
/**
* udev_device_get_udev:
* @udev_device: udev device