fix: handle if KERNEL_DEVICETREE isn't defined

diff --git a/conf/machine/include/utilities.inc b/conf/machine/include/utilities.inc
index 164d77f428ecf5bbd796844c5b481d11c293d6b9..e9695bde0bb00a66a7f5acdccb2434bdf697fa1b 100644 (file)
--- a/conf/machine/include/utilities.inc
+++ b/conf/machine/include/utilities.inc
@@ -6,6 +6,11 @@ def make_dtb_boot_files(d):
     # Use only the basename for dtb files:
     alldtbs = d.getVar('KERNEL_DEVICETREE')
 
+
+    # DTBs may be built out of kernel with devicetree.bbclass
+    if not alldtbs:
+        return ''
+
     def transform(dtb):
         if not (dtb.endswith('dtb') or dtb.endswith('dtbo')):
             # eg: whatever/bcm2708-rpi-b.dtb has: