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

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Date:   Wed, 17 May 2023 14:28:11 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Dan Williams <dan.j.williams@...el.com>,
        Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc:     linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ira Weiny <ira.weiny@...el.com>
Subject: [PATCH 2/3] cxl/pci: Update comment

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>
---
 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;

-- 
2.40.0