[U-Boot] [U-Boot, 2/2] fw_env: correct writes to devices with small erase blocks

[Tom Rini]

On Thu, Mar 06, 2014 at 08:48:23PM -0800, Dustin Byford wrote:

> Some NOR flash devices have a small erase block size.  For example, the
> Micron N25Q512 can erase in 4K blocks.  These devices expose a bug in
> fw_env.c where flash_write_buf() incorrectly calculates bytes written
> and attempts to write past the environment sectors.  Luckily, a range
> check prevents any real damage, but this does cause fw_setenv to fail
> with an error.
> 
> This change corrects the write length calculation.
> 
> The bug was introduced with commit 56086921 from 2008 and only affects
> configurations where the erase block size is smaller than the total
> environment data size.
> 
> Signed-off-by: Dustin Byford <dustin at cumulusnetworks.com>

Applied to u-boot/master, thanks!

-- 
Tom
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