linux-kernel - Re: [PATCH 2/3] cxl/pci: Update comment

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Date:   Wed, 17 May 2023 14:32:37 -0700
From:   Dave Jiang <dave.jiang@...el.com>
To:     Ira Weiny <ira.weiny@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc:     linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] cxl/pci: Update comment



On 5/17/23 2:28 PM, Ira Weiny wrote:
> The existence of struct cxl_dev_id containing a single member is odd.
> The comment made sense when I wrote it but could be clarified.
> 
> Update the comment and place it next to the odd looking structure.
> 
> Signed-off-by: Ira Weiny <ira.weiny@...el.com>

Reviewed-by: Dave Jiang <dave.jiang@...el.com>

> ---
>   drivers/cxl/pci.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
> index f7a5b8e9c102..ad7a1276fdc5 100644
> --- a/drivers/cxl/pci.c
> +++ b/drivers/cxl/pci.c
> @@ -469,6 +469,10 @@ static int cxl_alloc_irq_vectors(struct pci_dev *pdev)
>   	return 0;
>   }
>   
> +/*
> + * Threaded irq dev_id's must be globally unique.  cxl_dev_id provides a unique
> + * wrapper object for each irq within the same cxlds.
> + */
>   struct cxl_dev_id {
>   	struct cxl_dev_state *cxlds;
>   };
> @@ -506,7 +510,6 @@ static int cxl_event_req_irq(struct cxl_dev_state *cxlds, u8 setting)
>   	if (FIELD_GET(CXLDEV_EVENT_INT_MODE_MASK, setting) != CXL_INT_MSI_MSIX)
>   		return -ENXIO;
>   
> -	/* dev_id must be globally unique and must contain the cxlds */
>   	dev_id = devm_kzalloc(dev, sizeof(*dev_id), GFP_KERNEL);
>   	if (!dev_id)
>   		return -ENOMEM;
>