linux-kernel - Re: [PATCH] bootconfig: Fix missing return check of xbc_node_compose

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Message-Id: <20210831164046.b62e20443e2a1852d91b87bb@kernel.org>
Date:   Tue, 31 Aug 2021 16:40:46 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Julio Faracco <jcfaracco@...il.com>
Cc:     rostedt@...dmis.org, mingo@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bootconfig: Fix missing return check of
 xbc_node_compose_key function

On Tue, 31 Aug 2021 00:32:56 -0300
Julio Faracco <jcfaracco@...il.com> wrote:

> The function `xbc_show_list should` handle the keys during the
> composition. Even the errors returned by the compose function. Instead
> of removing the `ret` variable, it should save the value and show the
> exact error. This missing variable is causing a compilation issue also.
> 

Oops, good catch! Hmm, I missed some intermediate patch for some commit.
Let me check.

Thanks,

> Signed-off-by: Julio Faracco <jcfaracco@...il.com>
> ---
>  tools/bootconfig/main.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c
> index f45fa992e01d..fd67496a947f 100644
> --- a/tools/bootconfig/main.c
> +++ b/tools/bootconfig/main.c
> @@ -111,9 +111,11 @@ static void xbc_show_list(void)
>  	char key[XBC_KEYLEN_MAX];
>  	struct xbc_node *leaf;
>  	const char *val;
> +	int ret;
>  
>  	xbc_for_each_key_value(leaf, val) {
> -		if (xbc_node_compose_key(leaf, key, XBC_KEYLEN_MAX) < 0) {
> +		ret = xbc_node_compose_key(leaf, key, XBC_KEYLEN_MAX);
> +		if (ret < 0) {
>  			fprintf(stderr, "Failed to compose key %d\n", ret);
>  			break;
>  		}
> -- 
> 2.31.1
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>