linux-kernel - Re: [PATCH v1 28/29] cxl/region: Show message on broken target list

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Message-ID: <20250114111641.00001cf5@huawei.com>
Date: Tue, 14 Jan 2025 11:16:41 +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>, Dan Williams
	<dan.j.williams@...el.com>, Dave Jiang <dave.jiang@...el.com>, "Davidlohr
 Bueso" <dave@...olabs.net>, <linux-cxl@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Gregory Price <gourry@...rry.net>, "Fabio M.
 De Francesco" <fabio.m.de.francesco@...ux.intel.com>, Terry Bowman
	<terry.bowman@....com>
Subject: Re: [PATCH v1 28/29] cxl/region: Show message on broken target list

On Tue, 7 Jan 2025 15:10:14 +0100
Robert Richter <rrichter@....com> wrote:

> Broken target lists are hard to discover as the driver fails at a
> later initialization stage. Add an error message for this.
> 
> Signed-off-by: Robert Richter <rrichter@....com>
> ---
>  drivers/cxl/core/region.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
> index 775450a1a887..2af3b6c14f46 100644
> --- a/drivers/cxl/core/region.c
> +++ b/drivers/cxl/core/region.c
> @@ -1870,6 +1870,13 @@ static int find_pos_and_ways(struct cxl_port *port, struct range *range,
>  	}
>  	put_device(dev);
>  
> +	if (rc)
> +		dev_err(port->uport_dev,
> +			"failed to find %s:%s in target list of %s\n",
> +			dev_name(&port->dev),
> +			dev_name(port->parent_dport->dport_dev),
> +			dev_name(&cxlsd->cxld.dev));
> +
>  	return rc;
>  }
This function would benefit from some __free() magic dust.
Then we could return in the good path in the loop and not need the if (rc)
check here.

Otherwise looks fine.

Jonathan

>