[U-Boot] [PATCH 1/2] fdt: Avoid early panic() when there is no FDT present

[Wolfgang Denk]

Dear Simon Glass,

In message <1332965305-21151-1-git-send-email-sjg at chromium.org> you wrote:
> CONFIG_OF_CONTROL requires a valid device tree. However, we cannot call
> panic() before the console is set up since the message does not appear,
> and we get a silent failure.
...
> +int fdtdec_prepare_fdt(void);
> +
> +/**
> + * Checks that we have a valid fdt available to control U-Boot.
> +
> + * However, if not then for the moment nothing is done, since this function
> + * is called too early to panic().
> + *
> + * @returns 0

If the function always returns 0, then it makes no sense to return any
value at all.  Please make it void, then.

> +int fdtdec_check_fdt(void)
> +{
> +	/*
> +	 * We must have an FDT, but we cannot panic() yet since the console
> +	 * is not ready. So for now, just assert(). Boards which need an early
> +	 * FDT (prior to console ready) will need to make their own
> +	 * arrangements and do their own checks.
> +	 */
> +	assert(!fdtdec_prepare_fdt());
> +	return 0;
> +}

Ditto - make that "void fdtdec_check_fdt(void)".

> +int fdtdec_prepare_fdt(void)
...
>  	return 0;
>  }

Ditto - make that "void fdtdec_prepare_fdt(void)".


I have to admit that I do not understand how this patch will help you
anything.  You write "we cannot panic()", but "just assert()".

If the assertion fails, it will call __assert_fail() - which in turn
will just call panic().  So you are out of the frying pan into the
fire.

Best regards,

Wolfgang Denk

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