linux-kernel - Re: [PATCH] cxl/mbox: Add debug messages for supported mailbox commands

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Message-ID: <Y84dleBbsQhE0Dic@aschofie-mobl2>
Date:   Sun, 22 Jan 2023 21:39:33 -0800
From:   Alison Schofield <alison.schofield@...el.com>
To:     Robert Richter <rrichter@....com>
Cc:     Vishal Verma <vishal.l.verma@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Jonathan Cameron <jonathan.cameron@...wei.com>,
        linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cxl/mbox: Add debug messages for supported mailbox
 commands

On Thu, Jan 19, 2023 at 02:04:50PM +0100, Robert Richter wrote:
> Only unsupported mailbox commands are reported in debug messages. A
> list of supported commands is useful too. Change debug messages to
> also report the opcodes of supported commands.

Hi Robert,
I wonder if you can get this info another way. When I try this 
loading cxl_test today, I get 99 new messages. Is this going to
create too much noise with debug kernels?
Alison

> 
> On that occasion also add missing trailing newlines.
> 
> Signed-off-by: Robert Richter <rrichter@....com>
> ---
>  drivers/cxl/core/mbox.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
> index a48ade466d6a..ffa9f84c2dce 100644
> --- a/drivers/cxl/core/mbox.c
> +++ b/drivers/cxl/core/mbox.c
> @@ -629,11 +629,12 @@ static void cxl_walk_cel(struct cxl_dev_state *cxlds, size_t size, u8 *cel)
>  
>  		if (!cmd) {
>  			dev_dbg(cxlds->dev,
> -				"Opcode 0x%04x unsupported by driver", opcode);
> +				"Opcode 0x%04x unsupported by driver\n", opcode);
>  			continue;
>  		}
>  
>  		set_bit(cmd->info.id, cxlds->enabled_cmds);
> +		dev_dbg(cxlds->dev, "Opcode 0x%04x supported by driver\n", opcode);
>  	}
>  }
>  
> 
> base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2
> -- 
> 2.30.2
>