[PATCH u-boot-marvell 09/13] tools: kwboot: Simplify code for aligning image header

[Marek Behún]

From: Pali Rohár <pali at kernel.org>

Expression (hdrsz % KWBOOT_XM_BLKSZ) is non-zero therefore expression
(KWBOOT_XM_BLKSZ - hdrsz % KWBOOT_XM_BLKSZ) is always less than value
KWBOOT_XM_BLKSZ. So there is no need to add another modulo. Also rename
variable `offset` to `grow` which better describes what is stored in
this variable.

Signed-off-by: Pali Rohár <pali at kernel.org>
Reviewed-by: Marek Behún <marek.behun at nic.cz>
---
 tools/kwboot.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 7fd28aa754..adec4ec97d 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -1563,8 +1563,7 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
 	}
 
 	if (hdrsz % KWBOOT_XM_BLKSZ) {
-		size_t offset = (KWBOOT_XM_BLKSZ - hdrsz % KWBOOT_XM_BLKSZ) %
-				KWBOOT_XM_BLKSZ;
+		size_t grow = KWBOOT_XM_BLKSZ - hdrsz % KWBOOT_XM_BLKSZ;
 
 		if (is_secure) {
 			fprintf(stderr, "Cannot align image with secure header\n");
@@ -1572,7 +1571,7 @@ kwboot_img_patch(void *img, size_t *size, int baudrate)
 		}
 
 		kwboot_printv("Aligning image header to Xmodem block size\n");
-		kwboot_img_grow_hdr(img, size, offset);
+		kwboot_img_grow_hdr(img, size, grow);
 	}
 
 	hdr->checksum = kwboot_hdr_csum8(hdr) - csum;
-- 
2.32.0