linux-kernel - Re: [PATCH] of: reserved_mem: fix error log for reserved mem init failure

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Date:   Fri, 8 Dec 2023 14:31:28 -0600
From:   Rob Herring <robh@...nel.org>
To:     Pintu Kumar <quic_pintu@...cinc.com>
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        linux-mm@...ck.org, frowand.list@...il.com,
        devicetree@...r.kernel.org, pintu.ping@...il.com
Subject: Re: [PATCH] of: reserved_mem: fix error log for reserved mem init
 failure

On Wed, Dec 06, 2023 at 08:46:00PM +0530, Pintu Kumar wrote:
> During fdt_init_reserved_mem() when __reserved_mem_init_node()
> fail we are using pr_info to print error.
> 
> So, if we change the loglevel to 4 (or below), this error
> message will be missed.
> 
> Thus, change the pr_info to pr_err for fail case.
> 
> Signed-off-by: Pintu Kumar <quic_pintu@...cinc.com>
> ---
>  drivers/of/of_reserved_mem.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
> index 7ec94cfcbddb..473665e76b6f 100644
> --- a/drivers/of/of_reserved_mem.c
> +++ b/drivers/of/of_reserved_mem.c
> @@ -334,7 +334,7 @@ void __init fdt_init_reserved_mem(void)
>  		if (err == 0) {
>  			err = __reserved_mem_init_node(rmem);
>  			if (err != 0 && err != -ENOENT) {
> -				pr_info("node %s compatible matching fail\n",
> +				pr_err("node %s compatible matching fail\n",

Isn't the message just wrong. If compatible match fails, we return 
ENOENT. The failure here would be from the init function.

>  					rmem->name);
>  				if (nomap)
>  					memblock_clear_nomap(rmem->base, rmem->size);
> -- 
> 2.17.1
>