From: Marcel Holtmann <marcel@holtmann.org>
Date: Sat, 3 Jan 2009 10:10:10 +0000 (+0100)
Subject: libudev: device - lookup subsystem and devtype together
X-Git-Tag: 174~1228
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=883012d49b0635ab20898a649fcce6db21288571

libudev: device - lookup subsystem and devtype together
---

diff --git a/udev/lib/exported_symbols b/udev/lib/exported_symbols
index 6b07842a8..88d5c48c1 100644
--- a/udev/lib/exported_symbols
+++ b/udev/lib/exported_symbols
@@ -17,7 +17,7 @@ udev_device_new_from_devnum
 udev_device_new_from_subsystem_sysname
 udev_device_get_parent
 udev_device_get_parent_with_subsystem
-udev_device_get_parent_with_devtype
+udev_device_get_parent_with_subsystem_devtype
 udev_device_ref
 udev_device_unref
 udev_device_get_udev
diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c
index a25716d95..7c803594e 100644
--- a/udev/lib/libudev-device.c
+++ b/udev/lib/libudev-device.c
@@ -557,17 +557,26 @@ struct udev_device *udev_device_get_parent_with_subsystem(struct udev_device *ud
 	return parent;
 }
 
-struct udev_device *udev_device_get_parent_with_devtype(struct udev_device *udev_device, const char *devtype)
+struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype)
 {
 	struct udev_device *parent;
 
+	if (subsystem == NULL)
+		return NULL;
+
 	parent = udev_device_get_parent(udev_device);
 	while (parent != NULL) {
+		const char *parent_subsystem;
 		const char *parent_devtype;
 
-		parent_devtype = udev_device_get_devtype(parent);
-		if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0)
-			break;
+		parent_subsystem = udev_device_get_subsystem(parent);
+		if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) {
+			if (devtype == NULL)
+				break;
+			parent_devtype = udev_device_get_devtype(parent);
+			if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0)
+				break;
+		}
 		parent = udev_device_get_parent(parent);
 	}
 	return parent;
diff --git a/udev/lib/libudev.h b/udev/lib/libudev.h
index b96e49429..bac362a36 100644
--- a/udev/lib/libudev.h
+++ b/udev/lib/libudev.h
@@ -63,7 +63,7 @@ extern struct udev_device *udev_device_new_from_devnum(struct udev *udev, char t
 extern struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname);
 extern struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
 extern struct udev_device *udev_device_get_parent_with_subsystem(struct udev_device *udev_device, const char *subsystem);
-extern struct udev_device *udev_device_get_parent_with_devtype(struct udev_device *udev_device, const char *devtype);
+extern struct udev_device *udev_device_get_parent_with_subsytem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype);
 extern struct udev_device *udev_device_ref(struct udev_device *udev_device);
 extern void udev_device_unref(struct udev_device *udev_device);
 extern struct udev *udev_device_get_udev(struct udev_device *udev_device);