[PATCH] fastboot: fix CRC32 chunk size checking

[Wojciech Nizinski]

genimage create android-sparse file with CRC32 chunk at end. When
U-Boot's fastboot receives this chunk it returns error message:
`Fail Bogus chunk size for chunk type Dont Care`

According to reference implementation of Android's sparse file format:

<https://android.googlesource.com/platform/system/core/+/refs/heads/main/
libsparse/output_file.cpp#513>

the chunk_header.total_sz is CHUNK_HEADER_LEN + 4 (CRC32 size).

Signed-off-by: Wojciech Nizinski <niziak at spox.org>
---

 lib/image-sparse.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/image-sparse.c b/lib/image-sparse.c
index 8f8a67e158..323aad981c 100644
--- a/lib/image-sparse.c
+++ b/lib/image-sparse.c
@@ -289,8 +289,8 @@ int write_sparse_image(struct sparse_storage *info,
 
 		case CHUNK_TYPE_CRC32:
 			if (chunk_header->total_sz !=
-			    sparse_header->chunk_hdr_sz) {
-				info->mssg("Bogus chunk size for chunk type Dont Care",
+			    sparse_header->chunk_hdr_sz + sizeof(uint32_t)) {
+				info->mssg("Bogus chunk size for chunk type CRC32",
 					   response);
 				return -1;
 			}
-- 
2.39.2