[PATCH 2/2] rpi-sdimg: Limit volume id value

[Anton Mikanovich <amikan@ilbers.de>]

The volume name should be up to 11 characters long.
It is longer for some rpi targets and fails with the following error:

| mkfs.vfat: Label can be no longer than 11 characters
| mkfs.fat 4.2 (2021-01-31)
| WARNING: exit code 1 from a shell command.

Limit volume name length to fix the issue.

Signed-off-by: Anton Mikanovich <amikan@ilbers.de>
---
 meta-isar/classes/rpi-sdimg.bbclass | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/meta-isar/classes/rpi-sdimg.bbclass b/meta-isar/classes/rpi-sdimg.bbclass
index 1efc1c4..0b5a2a8 100644
--- a/meta-isar/classes/rpi-sdimg.bbclass
+++ b/meta-isar/classes/rpi-sdimg.bbclass
@@ -46,7 +46,11 @@ do_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 $BOOT_BLOCKS
+
+    # Limit volume name length to be 11 characters long
+    VOLUME_NAME=$(echo "${BOOTDD_VOLUME_ID}" | sed 's/^\(.\{11\}\).*/\1/g')
+
+    mkfs.vfat -n "$VOLUME_NAME" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
     mcopy -i ${WORKDIR}/boot.img -s ${IMAGE_ROOTFS}/boot/* ::/
 
     # Burn Partitions
-- 
2.17.1