linux-kernel - Re: detecting misuse of of_get

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Message-ID: <20191029114750.a7inago2vd2o4lzl@ltop.local>
Date:   Tue, 29 Oct 2019 12:47:50 +0100
From:   Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Dan Carpenter <dan.carpenter@...cle.co>,
        linux-sparse@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: detecting misuse of of_get_property

On Tue, Oct 29, 2019 at 01:50:58PM +0300, Dan Carpenter wrote:
> +static void match_of_get_property(const char *fn, struct expression *expr, void *unused)
> +{
> +	struct expression *left = expr->left;
> +	struct symbol *type;
> +
> +	type = get_type(left);
> +	if (!type || type->type != SYM_PTR)
> +		return;
> +	type = get_base_type(type);
> +	if (type_bits(type) == 8)
> +		return;
> +	if (type->type == SYM_RESTRICT)
> +		return;

Wouldn't this also silently accept assignments to any bitwise
type: __le32, __be16, ... ? 

-- Luc