image_types_fsl: Fix boot.img overwrite error

Recent updates to the MSDOS tools (OE-core is now at 3.0.28) have made
it an error to overwrite an image using mkfs.vfat:
  mkfs.vfat: file XXXX/tmp/work/nitrogen6x-poky-linux-gnueabi/network-demo-image/1.0-r0/boot.img already exists
  mkfs.fat 3.0.28 (2015-05-16)
  WARNING: exit code 1 from a shell command.

This patch fixes the problem by removing any old/stale images before
trying to create the VFAT file system images.

Change-Id: I74e02fd512b43315b29698f534192632d7780df2
Signed-off-by: Gary Thomas <gary@mlbassoc.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 2 insertions, 0 deletions

diff --git a/classes/image_types_fsl.bbclass b/classes/image_types_fsl.bbclass
index 1ebcb06..b542549 100644
--- a/classes/image_types_fsl.bbclass
+++ b/classes/image_types_fsl.bbclass
@@ -152,6 +152,7 @@ generate_imx_sdcard () {
         # Create boot partition image
         BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDCARD} unit b print \
                           | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 1024 }')
+        rm -f ${WORKDIR}/boot.img
         mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
         mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.bin ::/${KERNEL_IMAGETYPE}
 
@@ -255,6 +256,7 @@ generate_mxs_sdcard () {
                 BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDCARD} unit b print \
                 | awk '/ 2 / { print substr($4, 1, length($4 -1)) / 1024 }')
 
+                rm -f ${WORKDIR}/boot.img
                 mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
                 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.bin ::/${KERNEL_IMAGETYPE}
                 if test -n "${KERNEL_DEVICETREE}"; then