[PATCH v2] fastboot: Fix overflow when calculating chunk size

[Tom Rini]

On Thu, May 27, 2021 at 12:02:34PM -0400, Sean Anderson wrote:

> If a chunk was larger than 4GiB, then chunk_data_sz would overflow and
> blkcnt would not be calculated correctly. Upgrade it to a u64 and cast
> its multiplicands as well. Also fix bytes_written while we're at it.
> 
> Signed-off-by: Sean Anderson <sean.anderson at seco.com>
> Reviewed-by: Heiko Schocher <hs at denx.de>

Applied to u-boot/master, thanks!

-- 
Tom
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