build/roms: warn if grub_scan_disk is not set at all

1 files changed, 6 insertions, 1 deletions

diff --git a/resources/scripts/build/boot/roms_helper b/resources/scripts/build/boot/roms_helper
index f4eeccf9..d98195f1 100755
--- a/resources/scripts/build/boot/roms_helper
+++ b/resources/scripts/build/boot/roms_helper
@@ -49,7 +49,7 @@ fi
 
 
 # Workaround to grub's slow boot
-grub_scan_disk="both" # both: scan ata and ahci (slow), there is ata and ahci too
+grub_scan_disk="undefined" # both: scan ata and ahci (slow), there is ata and ahci too
                       # as an option
 cbtree="undefined"
 romtype="normal" # optional parameter in board.cfg. "normal" is default
@@ -65,6 +65,11 @@ payload_memtest="n"
 # Override the above defaults using board.cfg
 source "resources/coreboot/${board}/board.cfg"
 
+if [ "${grub_scan_disk}" = "undefined" ]; then
+	printf "build/roms: Target %s does not define grub_scan_disk. Defaulting to 'both'.\n" "${board}"
+	grub_scan_disk="both"
+fi
+
 if [ "${grub_scan_disk}" != "both" ] && \
 	[ "${grub_scan_disk}" != "ata" ] && \
 	[ "${grub_scan_disk}" != "ahci" ]; then