[PATCH v8 2/9] dax/hmem: Factor HMEM registration into __hmem_register_device()

[Smita Koralahalli]

Separate the CXL overlap check from the HMEM registration path and keep
the platform-device setup in a dedicated __hmem_register_device().

This makes hmem_register_device() the policy entry point for deciding
whether a range should be deferred to CXL, while __hmem_register_device()
handles the HMEM registration flow.

No functional changes.

Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@xxxxxxx>
---
 drivers/dax/hmem/hmem.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/dax/hmem/hmem.c b/drivers/dax/hmem/hmem.c
index 1cf7c2a0ee1c..a3d45032355c 100644
--- a/drivers/dax/hmem/hmem.c
+++ b/drivers/dax/hmem/hmem.c
@@ -58,21 +58,14 @@ static void release_hmem(void *pdev)
 	platform_device_unregister(pdev);
 }
 
-static int hmem_register_device(struct device *host, int target_nid,
-				const struct resource *res)
+static int __hmem_register_device(struct device *host, int target_nid,
+				  const struct resource *res)
 {
 	struct platform_device *pdev;
 	struct memregion_info info;
 	long id;
 	int rc;
 
-	if (IS_ENABLED(CONFIG_CXL_REGION) &&
-	    region_intersects(res->start, resource_size(res), IORESOURCE_MEM,
-			      IORES_DESC_CXL) != REGION_DISJOINT) {
-		dev_dbg(host, "deferring range to CXL: %pr\n", res);
-		return 0;
-	}
-
 	rc = region_intersects_soft_reserve(res->start, resource_size(res));
 	if (rc != REGION_INTERSECTS)
 		return 0;
@@ -123,6 +116,19 @@ static int hmem_register_device(struct device *host, int target_nid,
 	return rc;
 }
 
+static int hmem_register_device(struct device *host, int target_nid,
+				const struct resource *res)
+{
+	if (IS_ENABLED(CONFIG_CXL_REGION) &&
+	    region_intersects(res->start, resource_size(res), IORESOURCE_MEM,
+			      IORES_DESC_CXL) != REGION_DISJOINT) {
+		dev_dbg(host, "deferring range to CXL: %pr\n", res);
+		return 0;
+	}
+
+	return __hmem_register_device(host, target_nid, res);
+}
+
 static int dax_hmem_platform_probe(struct platform_device *pdev)
 {
 	return walk_hmem_resources(&pdev->dev, hmem_register_device);
-- 
2.17.1