linux-kernel - [PATCH v13 18/25] cxl: Change CXL handlers to use guard() instead of scoped

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Message-ID: <20251104001001.3833651-19-terry.bowman@amd.com>
Date: Mon, 3 Nov 2025 18:09:54 -0600
From: Terry Bowman <terry.bowman@....com>
To: <dave@...olabs.net>, <jonathan.cameron@...wei.com>,
	<dave.jiang@...el.com>, <alison.schofield@...el.com>,
	<dan.j.williams@...el.com>, <bhelgaas@...gle.com>, <shiju.jose@...wei.com>,
	<ming.li@...omail.com>, <Smita.KoralahalliChannabasappa@....com>,
	<rrichter@....com>, <dan.carpenter@...aro.org>,
	<PradeepVineshReddy.Kodamati@....com>, <lukas@...ner.de>,
	<Benjamin.Cheatham@....com>, <sathyanarayanan.kuppuswamy@...ux.intel.com>,
	<linux-cxl@...r.kernel.org>, <alucerop@....com>, <ira.weiny@...el.com>
CC: <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	<terry.bowman@....com>
Subject: [PATCH v13 18/25] cxl: Change CXL handlers to use guard() instead of scoped_guard()

The CXL protocol error handlers use scoped_guard() to guarantee access to
the underlying CXL memory device. Improve readability and reduce complexity
by changing the current scoped_guard() to be guard().

Signed-off-by: Terry Bowman <terry.bowman@....com>

---

Changes in v12->v13:
- New patch
---
 drivers/cxl/core/ras.c | 53 +++++++++++++++++++++---------------------
 1 file changed, 26 insertions(+), 27 deletions(-)

diff --git a/drivers/cxl/core/ras.c b/drivers/cxl/core/ras.c
index 19d9ffe885bf..cb712772de5c 100644
--- a/drivers/cxl/core/ras.c
+++ b/drivers/cxl/core/ras.c
@@ -254,19 +254,19 @@ void cxl_cor_error_detected(struct pci_dev *pdev)
 	struct cxl_dev_state *cxlds = pci_get_drvdata(pdev);
 	struct device *dev = &cxlds->cxlmd->dev;
 
-	scoped_guard(device, dev) {
-		if (!dev->driver) {
-			dev_warn(&pdev->dev,
-				 "%s: memdev disabled, abort error handling\n",
-				 dev_name(dev));
-			return;
-		}
-
-		if (cxlds->rcd)
-			cxl_handle_rdport_errors(cxlds);
+	guard(device)(dev);
 
-		cxl_handle_cor_ras(&cxlds->cxlmd->dev, cxlds->serial, cxlds->regs.ras);
+	if (!dev->driver) {
+		dev_warn(&pdev->dev,
+			 "%s: memdev disabled, abort error handling\n",
+			 dev_name(dev));
+		return;
 	}
+
+	if (cxlds->rcd)
+		cxl_handle_rdport_errors(cxlds);
+
+	cxl_handle_cor_ras(&cxlds->cxlmd->dev, cxlds->serial, cxlds->regs.ras);
 }
 EXPORT_SYMBOL_NS_GPL(cxl_cor_error_detected, "CXL");
 
@@ -278,25 +278,24 @@ pci_ers_result_t cxl_error_detected(struct pci_dev *pdev,
 	struct device *dev = &cxlmd->dev;
 	bool ue;
 
-	scoped_guard(device, dev) {
-		if (!dev->driver) {
-			dev_warn(&pdev->dev,
-				 "%s: memdev disabled, abort error handling\n",
-				 dev_name(dev));
-			return PCI_ERS_RESULT_DISCONNECT;
-		}
+	guard(device)(dev);
 
-		if (cxlds->rcd)
-			cxl_handle_rdport_errors(cxlds);
-		/*
-		 * A frozen channel indicates an impending reset which is fatal to
-		 * CXL.mem operation, and will likely crash the system. On the off
-		 * chance the situation is recoverable dump the status of the RAS
-		 * capability registers and bounce the active state of the memdev.
-		 */
-		ue = cxl_handle_ras(&cxlds->cxlmd->dev, cxlds->serial, cxlds->regs.ras);
+	if (!dev->driver) {
+		dev_warn(&pdev->dev,
+			 "%s: memdev disabled, abort error handling\n",
+			 dev_name(dev));
+		return PCI_ERS_RESULT_DISCONNECT;
 	}
 
+	if (cxlds->rcd)
+		cxl_handle_rdport_errors(cxlds);
+	/*
+	 * A frozen channel indicates an impending reset which is fatal to
+	 * CXL.mem operation, and will likely crash the system. On the off
+	 * chance the situation is recoverable dump the status of the RAS
+	 * capability registers and bounce the active state of the memdev.
+	 */
+	ue = cxl_handle_ras(&cxlds->cxlmd->dev, cxlds->serial, cxlds->regs.ras);
 
 	switch (state) {
 	case pci_channel_io_normal:
-- 
2.34.1