[PATCH v5 6/8] common: add AUTOBOOT_FLUSH_STDIN option

[Tom Rini]

On Thu, Jul 08, 2021 at 03:57:38PM +0200, Steffen Jaeckel wrote:

> The key-sequence based unlock mechanisms are sensitive to junk symbols
> that could have been sent to stdin and are still waiting to be retrieved.
> Enabling this option will read all symbols off stdin before displaying the
> autoboot prompt (and starting to read the password from stdin).
> 
> Signed-off-by: Steffen Jaeckel <jaeckel-floss at eyet-services.de>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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