[U-Boot] [PATCH] fastboot: mmc: Fix use of 64 bit division

[Hans de Goede]

Directly doing a 64 bit division (when CONFIG_SYS_64BIT_LBA is set)
causes linking to fail when building u-boot for ARMv7 with a hard-float
tool-chain.

This commit fixes this by properly using div_u64 for the division.

Note that an alternative fix would be to stop using lbaint_t for
blkcnt / blks, since the passed in "download_bytes" is only 32 bits
anyways. But we may want to support files / partitions larger then 4G
in the near future and using div_u64 is future proof for when
download_bytes' type gets changed to a lbaint_t itself.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 common/fb_mmc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index 0c48cf9..83d66ed 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -11,6 +11,8 @@
 #include <aboot.h>
 #include <sparse_format.h>
 #include <mmc.h>
+#include <div64.h>
+#include <linux/math64.h>
 
 #ifndef CONFIG_FASTBOOT_GPT_NAME
 #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
@@ -64,7 +66,7 @@ static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
 
 	/* determine number of blocks to write */
 	blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
-	blkcnt = blkcnt / info->blksz;
+	blkcnt = div_u64(blkcnt, info->blksz);
 
 	if (blkcnt > info->size) {
 		error("too large for partition: '%s'\n", part_name);
-- 
2.5.0