[PATCH] kexec-tools: Fix CRC calculation for padded uImage

[Helmut Schaa]

Instead of calulating the CRC on the whole file just calculate the CRC
on the actual uImage length as given by the uImage header. This fixes
loading padded uImages, for example from a mtd partition.

Signed-off-by: Helmut Schaa <helmut.schaa at googlemail.com>
---
 kexec/kexec-uImage.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kexec/kexec-uImage.c b/kexec/kexec-uImage.c
index 409e516..83e7910 100644
--- a/kexec/kexec-uImage.c
+++ b/kexec/kexec-uImage.c
@@ -72,7 +72,7 @@ int uImage_probe(const unsigned char *buf, off_t len, unsigned int arch)
 		return -1;
 	}
 #ifdef HAVE_LIBZ
-	crc = crc32(0, (void *)buf + sizeof(header), len - sizeof(header));
+	crc = crc32(0, (void *)buf + sizeof(header), be32_to_cpu(header.ih_size));
 	if (crc != be32_to_cpu(header.ih_dcrc)) {
 		printf("The data CRC does not match. Computed: %08x "
 				"expected %08x\n", crc,
-- 
1.7.7