sdcard_image: fix sdcard image generation

Rely on  shell environment when copying devicetree
and devicetree overlays to target image.

Signed-off-by: Janek Filus <janek.filus@bytesatwork.ch>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass
index 79ab53a..af3e807 100644
--- a/classes/sdcard_image-rpi.bbclass
+++ b/classes/sdcard_image-rpi.bbclass
@@ -107,7 +107,7 @@ IMAGE_CMD_rpi-sdimg () {
                 DT_ROOT="${@split_overlays(d, 1)}"
 
                 # Copy board device trees to root folder
-                for DTB in ${DT_ROOT}; do
+                for DTB in $DT_ROOT; do
                         DTB_BASE_NAME=`basename ${DTB} .dtb`
 
                         mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${DTB_BASE_NAME}.dtb ::${DTB_BASE_NAME}.dtb
@@ -115,7 +115,7 @@ IMAGE_CMD_rpi-sdimg () {
 
                 # Copy device tree overlays to dedicated folder
                 mmd -i ${WORKDIR}/boot.img overlays
-                for DTB in ${DT_OVERLAYS}; do
+                for DTB in $DT_OVERLAYS; do
                                 DTB_EXT=${DTB##*.}
                                 DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`