[yocto] [meta-raspberrypi][PATCH] sdcard_image: Fix sdcard image generation

[Gary Thomas]

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.  This patch fixes
that problem by removing any old/stale images, thus starting from scratch.

Signed-off-by: Gary Thomas <gary at mlbassoc.com>
---
 classes/sdcard_image-rpi.bbclass | 1 +
 1 file changed, 1 insertion(+)

diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass
index 7592cc1..62c0768 100644
--- a/classes/sdcard_image-rpi.bbclass
+++ b/classes/sdcard_image-rpi.bbclass
@@ -103,6 +103,7 @@ IMAGE_CMD_rpi-sdimg () {
 
 	# Create a vfat image with boot files
 	BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }')
+	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 ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/* ::/
 	case "${KERNEL_IMAGETYPE}" in
-- 
1.9.1