linux-kernel - [RFC PATCH 3/3] CXL/doe: Use devm_xa

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Date:   Tue,  5 Jul 2022 16:21:59 -0700
From:   ira.weiny@...el.com
To:     Dan Williams <dan.j.williams@...el.com>,
        Matthew Wilcox <willy@...radead.org>
Cc:     Ira Weiny <ira.weiny@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        linux-kernel@...r.kernel.org, linux-cxl@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [RFC PATCH 3/3] CXL/doe: Use devm_xa_init()

From: Ira Weiny <ira.weiny@...el.com>

The DOE mailboxes are all allocated with device managed calls.
Therefore, the XArray can go away when the device goes away.

Use devm_xa_init() and remove the callback needed for xa_destroy().

Signed-off-by: Ira Weiny <ira.weiny@...el.com>
---
 drivers/cxl/pci.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 6228c95fd142..adb8198fc6ad 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -387,11 +387,6 @@ static int cxl_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type,
 	return rc;
 }
 
-static void cxl_pci_destroy_doe(void *mbs)
-{
-	xa_destroy(mbs);
-}
-
 static void devm_cxl_pci_create_doe(struct cxl_dev_state *cxlds)
 {
 	struct device *dev = cxlds->dev;
@@ -446,8 +441,7 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (IS_ERR(cxlds))
 		return PTR_ERR(cxlds);
 
-	xa_init(&cxlds->doe_mbs);
-	if (devm_add_action(&pdev->dev, cxl_pci_destroy_doe, &cxlds->doe_mbs))
+	if (devm_xa_init(&pdev->dev, &cxlds->doe_mbs))
 		return -ENOMEM;
 
 	cxlds->serial = pci_get_dsn(pdev);
-- 
2.35.3