pick actual valid device in udev_db_lookup_name

1 files changed, 20 insertions, 9 deletions

diff --git a/udev_db.c b/udev_db.c
index 5ac016a051..728d74a030 100644
--- a/udev_db.c
+++ b/udev_db.c
@@ -275,8 +275,7 @@ int udev_db_lookup_name(const char *name, char *devpath, size_t len)
 	while (!found) {
 		struct dirent *ent;
 		char device[PATH_SIZE];
-		char filename[PATH_SIZE];
-		struct stat statbuf;
+		struct udevice *udev;
 
 		ent = readdir(dir);
 		if (ent == NULL || ent->d_name[0] == '\0')
@@ -286,15 +285,27 @@ int udev_db_lookup_name(const char *name, char *devpath, size_t len)
 
 		strlcpy(device, ent->d_name, sizeof(device));
 		path_decode(device);
-
-		dbg("looking at '%s'", device);
-		strlcpy(filename, sysfs_path, sizeof(filename));
-		strlcat(filename, device, sizeof(filename));
-		if (stat(filename, &statbuf) == 0) {
-			strlcpy(devpath, device, len);
-			found = 1;
+		udev = udev_device_init();
+		if (udev == NULL)
 			break;
+		if (udev_db_get_device(udev, device) == 0) {
+			char filename[PATH_SIZE];
+			struct stat statbuf;
+
+			info("found db entry '%s'", device);
+			strlcpy(filename, udev_root, sizeof(filename));
+			strlcat(filename, "/", sizeof(filename));
+			strlcat(filename, name, sizeof(filename));
+			/* make sure device entry matches dev_t */
+			if (stat(filename, &statbuf) == 0) {
+				if (statbuf.st_rdev == udev->devt) {
+					info("node '%s' matches dev_t", udev->name);
+					strlcpy(devpath, device, len);
+					found = 1;
+				}
+			}
 		}
+		udev_device_cleanup(udev);
 	}
 
 	closedir(dir);