kernel: fix FIT partition parser compatibility issues

The uImage.FIT partition parser used to squeeze in FIT partitions in
the range where partition editor tools (fdisk and such) expect the
regular partition. This is confusing people and tools when adding
additional partitions on top of the partition used for OpenWrt's
uImage.FIT.
Instead of squeezing in the additional partitions, rather start with
all uImage.FIT partitions at offset 64.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 9 insertions, 33 deletions

diff --git a/target/linux/generic/hack-5.4/400-block-fit-partition-parser.patch b/target/linux/generic/hack-5.4/400-block-fit-partition-parser.patch
index 1f756fac9b..6b3267ef80 100644
--- a/target/linux/generic/hack-5.4/400-block-fit-partition-parser.patch
+++ b/target/linux/generic/hack-5.4/400-block-fit-partition-parser.patch
@@ -140,48 +140,24 @@
 +int parse_fit_partitions(struct parsed_partitions *state, u64 start_sector, u64 nr_sectors, int *slot, int add_remain);
 --- a/block/partitions/efi.c
 +++ b/block/partitions/efi.c
-@@ -679,7 +679,7 @@ int efi_partition(struct parsed_partitio
- {
- 	gpt_header *gpt = NULL;
+@@ -681,6 +681,9 @@ int efi_partition(struct parsed_partitio
  	gpt_entry *ptes = NULL;
--	u32 i;
-+	u32 i, slot = 0;
+ 	u32 i;
  	unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
++#ifdef CONFIG_FIT_PARTITION
++	u32 extra_slot = 64;
++#endif
  
  	if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
-@@ -698,16 +698,18 @@ int efi_partition(struct parsed_partitio
- 		u64 size = le64_to_cpu(ptes[i].ending_lba) -
- 			   le64_to_cpu(ptes[i].starting_lba) + 1ULL;
- 
--		if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
-+		if (!is_pte_valid(&ptes[i], last_lba(state->bdev))) {
-+			++slot;
- 			continue;
-+		}
- 
--		put_partition(state, i+1, start * ssz, size * ssz);
-+		put_partition(state, ++slot, start * ssz, size * ssz);
- 
- 		/* If this is a RAID volume, tell md */
- 		if (!efi_guidcmp(ptes[i].partition_type_guid, PARTITION_LINUX_RAID_GUID))
--			state->parts[i + 1].flags = ADDPART_FLAG_RAID;
-+			state->parts[slot].flags = ADDPART_FLAG_RAID;
- 
--		info = &state->parts[i + 1].info;
-+		info = &state->parts[slot].info;
- 		efi_guid_to_str(&ptes[i].unique_partition_guid, info->uuid);
- 
- 		/* Naively convert UTF16-LE to 7 bits. */
-@@ -721,7 +723,12 @@ int efi_partition(struct parsed_partitio
- 			info->volname[label_count] = c;
+ 		kfree(gpt);
+@@ -722,6 +725,11 @@ int efi_partition(struct parsed_partitio
  			label_count++;
  		}
--		state->parts[i + 1].has_info = true;
-+		state->parts[slot].has_info = true;
+ 		state->parts[i + 1].has_info = true;
 +#ifdef CONFIG_FIT_PARTITION
 +		/* If this is a U-Boot FIT volume it may have subpartitions */
 +		if (!efi_guidcmp(ptes[i].partition_type_guid, PARTITION_LINUX_FIT_GUID))
-+			(void) parse_fit_partitions(state, start * ssz, size * ssz, &slot, 1);
++			(void) parse_fit_partitions(state, start * ssz, size * ssz, &extra_slot, 1);
 +#endif
  	}
  	kfree(ptes);