wic: Force lba off for FAT16 partitions

If fat16 is specified to the mkpart parted command, parted will
default to setting the lba flag which causes certain EFI firmware
to fail to detect the filesystem. lba shouldn't be necessary for
FAT16 filesystems anyway, explicitly disable it.

(From OE-Core rev: 30442d432e203e655b7d40b93f7307f475de1614)

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/scripts/lib/mic/utils/partitionedfs.py b/scripts/lib/mic/utils/partitionedfs.py
index e8cded26e0..59263ba1a5 100644
--- a/scripts/lib/mic/utils/partitionedfs.py
+++ b/scripts/lib/mic/utils/partitionedfs.py
@@ -352,6 +352,16 @@ class PartitionedMount(Mount):
                 self.__run_parted(["-s", d['disk'].device, "set",
                                    "%d" % p['num'], flag_name, "on"])
 
+            # Parted defaults to enabling the lba flag for fat16 partitions,
+            # which causes compatibility issues with some firmware (and really
+            # isn't necessary).
+            if parted_fs_type == "fat16":
+                if d['ptable_format'] == 'msdos':
+                    msger.debug("Disable 'lba' flag for partition '%s' on disk '%s'" % \
+                                (p['num'], d['disk'].device))
+                    self.__run_parted(["-s", d['disk'].device, "set",
+                                       "%d" % p['num'], "lba", "off"])
+
         # If the partition table format is "gpt", find out PARTUUIDs for all
         # the partitions. And if users specified custom parition type UUIDs,
         # set them.