[PATCH V3] env: Fix invalid env handling in env_init()

[Tom Rini]

On Wed, Jan 20, 2021 at 03:45:16PM +0100, Marek Vasut wrote:

> This fixes the case where there are multiple environment drivers, one of
> them is the default environment one, and it is followed by an environment
> driver which does not implement .init() callback. The default environment
> driver sets gd->env_valid to ENV_INVALID and returns 0 from its .init()
> callback implementation, which is valid behavior for default environment.
> 
> Since the subsequent environment driver does not implement .init(), it
> also does not modify the $ret variable in the loop. Therefore, the loop
> is exited with gd->env_valid=ENV_INVALID and ret=0, which means that the
> code further down in env_init() will not reset the environment to the
> default one, which is incorrect.
> 
> This patch sets the $ret variable back to -ENOENT in case the env_valid
> is set to ENV_INVALID by an environment driver, so that the environment
> would be correctly reset back to default one, unless a subsequent driver
> loads a valid environment.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Tested-By: Tim Harvey <tharvey at gateworks.com>

Applied to u-boot/master, thanks!

-- 
Tom
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