[PATCH v3] cli: Consume invalid escape sequences early

[Tom Rini]

On Tue, Oct 10, 2023 at 11:16:39AM +0300, Yurii Monakov wrote:

> Unexpected 'Esc' key presses are accumulated internally, even if it is
> already clear that the current escape sequence is invalid. This results
> in weird behaviour. For example, the next character after 'Esc' key
> simply disappears from input and 'Unknown command' is printed
> after 'Enter'.
> 
> This commit fixes some issues with extra 'Esc' keys entered by user:
> 
> 1. Sequence <Esc><Esc><Enter> right after autoboot stop gives:
> =>
> nknown command 'ry 'help'
> =>
> 2. Sequence <Esc><p><r><i><Enter> gives:
> => ri
> Unknown command 'ri' - try 'help'
> =>
> 3. Extra 'Esc' key presses break backspace functionality.
> 
> Signed-off-by: Yurii Monakov <monakov.y at gmail.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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