[PATCH] common: fit-sig: Fix error message in fit_config_verify_sig()

[Tom Rini]

On Mon, Jan 11, 2021 at 08:46:58AM -0600, Alexandru Gagniuc wrote:

> In fit_config_verify_sig(), when no 'signature*' subnode exists in
> the configuration node, the fdt_for_each_subnode() loop is a no-op.
> Therefore, no error flags are set, and 'err_,sg' is not populated
> with an error string. This is incorrect behavior.
> 
> Populate err_msg to indicate that no 'signature' is found, before
> entering the loop. The first call to fit_image_verify_sig() will
> override clear err_msg, or set it to a more specific message.
> 
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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