linux-kernel - Re: [PATCH v2] cxl/mbox: Add debug messages for enabled mailbox commands

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Message-ID: <20230125102909.00002403@Huawei.com>
Date:   Wed, 25 Jan 2023 10:29:09 +0000
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Robert Richter <rrichter@....com>
CC:     Alison Schofield <alison.schofield@...el.com>,
        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>,
        Dave Jiang <dave.jiang@...el.com>, <linux-cxl@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] cxl/mbox: Add debug messages for enabled mailbox
 commands

On Wed, 25 Jan 2023 09:57:28 +0100
Robert Richter <rrichter@....com> wrote:

> Only unsupported mailbox commands are reported in debug messages. A
> list of enabled commands is useful too. Change debug messages to also
> report the opcodes of enabled commands. Esp. if card initialization
> fails there is no way to get this information from userland.
> 
> On that occasion also add missing trailing newlines.
> 
> Signed-off-by: Robert Richter <rrichter@....com>
Fine with change in message
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
> v2:
>  * Changed message to "Opcode 0x%04x enabled\n". Updated patch
>    description accordingly.
> 
>  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..202d49dd9911 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 enabled\n", opcode);
>  	}
>  }
>  
> 
> base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2